I thought Spanish fly was another fake drug to make a girl horny and everything I read agreed. It made me curious though so I really studied the subject using the library and the internet. Nothing really changes inhibitions in humans but I noticed that in some animals a female could go into heat. One of the things that mostly effected females was pheromones.

I should start with myself, my name is Adam, I’m sixteen and always horny. The problem is I’m shy and a bit of a nerd. I saw my mom in almost nothing all the time and that didn’t help. She always had boyfriends around so I heard them doing it many times. I like to fool around with chemicals and this idea really made me think. What I came up with took almost a month and several favors from men that work in labs.

I started with musk pheromones from male and female gorillas. After several days of work in my lab I had something I needed to test. I froze a diluted drop in an ice cube and when mom and her current guy came home Sunday night I slipped the cube in her drink. They were kissing and cuddling and I knew mom had put out the night before. Usually she would wait another day before letting him get more but...

I watched as the small cube melted and she drank her drink. Mom started rubbing her pussy and pressing against her boyfriend and before I knew it she was pulling him back towards her bedroom. She ignored making dinner which she never did. A few minutes later I heard mom wailing and howling, something she hadn’t done before either. I grinned as I started making dinner using a slow cooker recipe.

It was a couple of hours before she came out. She was blushing as she came in, her guy was still in the bedroom, apparently she wore him out and he was sleeping. I smiled, “You were really loud mom.”

She blushed even more, “I don’t know what happened, I just got so excited...”

She bent to kiss my cheek, “I’ll finish.”

I grinned, “And the sex was so good you had to scream?”

Mom laughed as she went to see what damage I had done to the dinner, “It was the best ever baby.”

I laughed as I thought my experiment had worked. After dinner I went to my lab and started using the pill press. It was something I had gotten to make sugar pill candy. After I had a few dozen I put a single drop of diluted formula on each pill. I let the sugar absorb the formula before putting them into a tiny breath mint container. The next day I put it around that I was looking for a girl that had a problem with her sex life.

I didn’t expect anyone to answer or come see me. I was eating lunch when Mary Jacobs stopped beside my table, “They say you have something to help a girl get excited and enjoy sex?”

I was surprised, she was one of the most beautiful girls in school. I nodded, “Are you willing to try it and tell me about it after you are done?”

She blinked, “You mean I don’t have to have sex with you?”

I blushed and looked down as I murmured under my breath, “I wish.”

She giggled, “Tell you what, how about if I come to your house and you can give your stuff to me.”

I nodded and she left, the rest of the day went slowly with guys sneering and girls laughing at me. When school got out Mary was waiting though and walked home with me. She looked around and followed me back to my room. I held out the breath mint container, “Only take one.”

She looked at me and then at the container before taking one out and putting it in her mouth. My mouth dropped open, “Not now!”

She grinned as she sucked on the sugar pill, “If it works you better close the door.”

I looked at her desperately before going to close the door. Mary glanced around and went to sit in my chair, “Where did you get these?”

I smiled as I faced her, “I have a small lab in my basement. I like to mess around with chemicals, you know make stuff.”

She grinned and absently rubbed her pussy through her skirt, “so you want to be a chemist?”

I nodded and looked up from her hand. She looked down and blushed, “oh...”

She looked at me, “mmmm...”

I smiled, “What do you feel?”

She blushed even more, “itchy and wet and... and horny.”

The last was said in surprise. She grinned, “I’m horny!”

She stood and started undressing, “get undressed.”

She said it calmly but I felt really nervous as I stripped. She looked at my hard, drooling cock and then up into my face, “You are hung aren’t you.”

I blushed as she grabbed my hand and pulled me to my bed. I pushed her down and knelt between her legs. She was right, she was very wet and her pussy seemed full and kind of puffy. I bent and started teasing her clit and pushed two fingers into her. She shuddered and her hips lifted off the bed, “AH!”

Her pussy tightened and squeezed my fingers as I fucked them up into the soft spongy area behind her pelvic bone. I kept sucking and teasing her clit as I fucked my fingers into her and a couple of minutes later she stiffened before jerking and bucking as she squirted, “HOLY FUCK!”

She thrashed around as I pulled my fingers out of her and licked her cum as she continued to jerk and shudder. She squirted a few more times before I stood and turned her on the bed. She was panting as she held out her arms and I moved between her legs. I pushed into her and her hips lifted as she shuddered almost violently, “OOOOOHHHHHHH.... FFFUUUUCCCKKKK!”

I couldn’t help myself, I fucked her with long, deep thrusts and her pussy began grasping and squeezing my cock. She thrashed around and wiggled under me as she kept wailing and howling. I only lasted a few minutes but by then Mary was incoherent. I thrust into her and pressed against her womb as I began to spew a huge, solid stream of cum.

Mary stiffened before thrusting her pussy up and screamed as it tightened, “IIII’MMMM... CCCCUUUMMMMIIIIINNNNNGGGGGG!”

She jerked and shuddered as I kept pumping more cum into her. It seemed like forever before I stopped cumming but she continued to shudder and shake. I gave her a tender kiss before pulling out and moving back. Mary growled as she rolled over and lifted her butt, “FUCK ME!”

I looked at my cum leaking out of her slit before moving. I pushed into her and held her hips as I started fucking her with deep thrusts. She thrust back onto my cock hard each time I pushed into her and a minute later she howled, “I’M CUMMING AGAIN!”

She was shaking and jerking as her pussy clenched around my cock. I kept fucking her and she continued to shudder and thrust back. I lasted maybe six minutes this time and by then Mary had put her head on the bed and kept yelling into it. I thrust into her and spewed huge spurts of cum. She stiffened and looked back before her pussy tightened and she squirted, “CCCCCUUUUUUMMMMMIIIIINNNNNGGGGG!”

She was shaking when I stopped and dropped to the bed. She sighed and shivered before turning over and spreading her legs. I looked at her gaping pussy and the cum running out. When I looked into her face she grinned and held out her arms, “Fuck me.”

I fucked Mary four more times and she kept wailing, howling and screaming. After the last time she lay panting on me as I caressed her hips and bare back. She finally took a deep breath and sighed. She looked at me and gave me a kiss, “Thank you.”

I helped her off me and into the bathroom where I washed her. After she got dressed she handed me the breath mint container, “If I need it, I’ll come back.”

She grinned, “How about Friday night?”

I blushed and nodded and walked her to the door. Mom cleared her throat from the kitchen door, “Have fun baby?”

I turned to see her grinning at me and reddened, “yes, it was the best ever.”

She laughed, “Come help me with dinner.”

Mom didn’t say anything else but she did touch me more and hug me. When I got to school almost every girl seemed to be looking at me and giggling. By lunch time it was obvious to everyone. I ignored it and went to eat my lunch outside. I glanced up when Mary walked up with another girl and sat down, “hey lover.”

I smiled, “Hi, are you doing okay?”

She grinned, “A little sore from fucking so much but it was worth it.”

I looked at the other girl and reddened and Mary laughed, “This is Tasha. She is having the same problem I was.”

I looked at Tasha, “do you want me to give you a few pills?”

She grinned, “How about we try one together and if they work Mary and I will come to an arrangement.”

I looked at Mary and she smiled, “I told everyone, you and I were going together.”

I looked at her in surprise and she glanced at Tasha, “see if your pill will help her Adam.”

I licked my lips, “if she takes it with me there...”

Mary laughed, “She will want to fuck you to death like I did?”

I nodded and she smiled at Tasha, “its therapy Adam.”

Tasha grinned, “sex therapy.”

I smiled and looked at Mary, “want to see a movie Friday before...”

I reddened and she grinned, “Before you help with my therapy?”

I looked at Tasha and she was grinning, “Well, you said we were going together.”

She laughed and leaned over to kiss me softly. When school got out Mary was waiting with Tasha and a couple of other girls. She smiled, “This is Devon and Lynn, they are having the same problem and wanted to watch what happens with Tasha.”

I opened my mouth but she took my hand, “I’m coming too.”

I looked at her and she smiled, “Just do to Tasha what you did to me.”

I looked at the other girls before nodding and leading them home. Once they were in my room I went to my desk and pulled out the breath mint container. I turned and let one spill into Tasha’s hand when she held it out. I put the container back in the drawer and leaned against my desk as the other girls sat on my bed, “so you girls have had sex but didn’t enjoy it or...”

Devon smiled, “I did but only because my boyfriend at the time wanted it.”

I looked at Lynn and she nodded, “Me too.”

Mary grinned, “It was always like that with me, until yesterday. I wanted Adam to fuck me and keep fucking me. I got off so hard again and again and...”

She giggled as the girls laughed. Tasha absently rubbed her pussy before shivering and then standing, “Speaking or wanting...”

I smiled and stood to undress as she did too. I moved her to the side of the bed and sat her down before pushing her legs open. I leaned in and opened her pussy to look at how wet and slippery she was before licking. I nibbled on her inner hips as she suddenly lifted her hips and gasped, “oh shit!”

Mary laughed, “see.”

I started teasing Tasha’s clit with my tongue and sucking and she jerked and squirted before bucking and thrusting her pussy into my face, “YES!”

It was a couple of minutes before I stopped and she was shaking bad. I turned her on the bed and she couldn’t wait to spread her legs and reach for my cock. I moved over her and she guided my cock before I slowly forced it into her tight pussy. Her hips lifted and she shuddered as she clutched me and her pussy squeezed, “OH MY GOD!”

I started fucking her with long, deep strokes and almost from the first thrust she started howling. She squirted and became slipperier as I fucked her with deep thrusts and began pressing and grinding. Tasha convulsed and started thrashing around, “I’M CUMMING!”

She jerked and bucked and twisted and I kept fucking her. It was another few minutes before I slowly buried my cock against her cervix. I hugged her as my balls tightened and then I was grunting as I spewed a stream of cum. Tasha jerked and shook before lifting and spreading her legs, “YYYEEEESSSSSS!”

When I stopped cumming she was panting and having random twitches. I pulled out and the other girls saw the cum running out of her. Tasha groaned and looked at me, “Again?”

I looked at Mary who was grinning with the other girls and laid down on my back, “Your turn to do the work.”

They giggled as Tasha rolled and scrambled onto me. She slipped my cock into her slimy pussy and pushed down before sighing and starting to rock and thrust back and forth. I fucked Tasha six times in six different positions and she screamed, wailed, howled and moaned through orgasm after orgasm.

When she was finally sated I sighed, I was still hard but sensitive. I looked at Mary, “I think I might have to dilute the formula a little more.”

She grinned as Devon and Lynn laughed. I caressed Tasha bare hip before moving off the bed and helping her up. Mary came to hug me and look at the other girls, “I told you.”

I slipped on pants as Tasha got dressed and walked them out. Mom was home and grinned but didn’t say anything. I went to my lab and diluted the formula a little before making fifty pills. I put them into another breath mint container. I took supplements that mom gave me while we were eating dinner and changed my bed linens after. School was busy with a lot more girls looking and whispering about me.

It was lunch time when Mary, Tasha, Devon and Lynn found me. Mary grinned and Tasha blushed, “Thanks Adam it was amazing.”

I smiled and nodded and glanced up at one of the football players. He looked at the girls and then at me, “are you selling any Spanish fly?”

I looked at the girls before looking at him, “To girls.”

He reddened and turned to look across the quad at his girlfriend. Mary looked at me, “Did you dilute it?”

I looked at her and blushed as I nodded. I pulled the container out of my pack and she grinned as she took it. She gestured and the other girls stood. She looked at the guy, “Stay here until we call you.”

He nodded as he sat down. We watched them walk across to his girlfriend and he looked at me, “this really works?”

I nodded and he grinned, “I will owe you big time.”

I looked at the girls and shrugged, “make sure she only takes one.”

He nodded and stood as Mary waved and started walking back. When the girls returned Mary handed the container back, “I gave her five but told her to only take one each time.”

I nodded as I tucked the container back in my pack. The girls were waiting for me after school and we walked to my house. They talked to each other and me the entire way which made me feel good. As soon as I closed the door Lynn started undressing. They all sat on the bed as I opened my book bag and Lynn grinned, “Do you still have the other pills?”

I nodded and pulled them out of my desk drawer. She smiled and held out her hand and I shrugged as I put one pill in her hand. She put it in her mouth and laid back on the bed, “Come lay with me.”

I glanced at Mary and the other girls and they grinned. I undressed before laying beside Lynn, “You don’t become aroused with your boyfriend?”

She rubbed my chest, “Not really. I mean, I should want to have sex or crave it right?”

I nodded and she sighed as she absently shivered, “I never did. I let him do it because that was what he wanted.”

I rubbed a pink nipple, “how do you feel now?”

She frowned and then her eyes widened, “My pussy is itchy and I feel like I need something...”

I pushed her back and slid down the bed. I look at the other girls as I opened her puffy pussy, “See how puffy her public mounds is and how wet she is?”

Mary rubbed my hip, “Talk later, lick her.”

Lynn moaned at those words and I leaned in to lick through her pussy. I pushed my tongue into her and then captured her clit. I started sucking and using my tongue and Lynn began to shudder and jerk. A minute later she arched her back and squirted, “YYYYEEEESSSSSS!”

She convulsed and twisted and jerked as I stopped and moved up. She moaned and shivered as she reached for my cock, “Fuck me.”

I lifted and let her guide my cock before pushing into her almost hot, slippery pussy. I started fucking her using long thrusts. It wasn’t long before she was thrashing around as her pussy spasmed around my cock, “AAAAAHHHHH!”

She jerked and twisted and writhed around as I continued to fuck her. I buried my cock to push open her cervix and she started kicking in the air as I humped and pressed into her, “OOOHHHH.... FFFUUUCCCKKK!”

She bucked and kept convulsing as I pulled back to fuck her hard and deep. For five minutes I fucked her as she wiggled, twisted, jerked and convulsed. I finally buried my cock as she howled and started spewing a torrent of warm cum. Lynn froze with a surprised look before shuddering as her pussy tightened and squeezed my cock, “Oh!”

I pumped spurt after spurt before stopping. Lynn was still panting and shivering as she grinned. I pulled out of her and she shuddered before laughing and rolling over, “do my ass?”

I looked at her and then at Mary and the other girls. Mary grinned, “go ahead.”

I moved behind her and rubbed some of the leaking cum on her ass. I used my cock to get more and started slowly humping and pressing. A minute later my cock pushed into her and she stiffened before shuddering as her ass squeezed my cock and she moaned. I fucked Lynn seven times before I stopped. She was sweating and grinning happily as she rubbed my chest, “It was the most wonderful, amazing feeling.”

Mary and Tasha laughed as Devon giggled. Mom waited until after they left to give me supplements with dinner. She was grinning as she ate and I sighed, “I am helping them mom. They have trouble becoming excited and enjoying sex.”

She laughed, “It sure didn’t sound like it.”

I looked at her, “Remember Sunday when you... had sex with your boyfriend?”

She smiled as she ate and nodded, “I remember, I have never got off that good before...”

She looked at me, “You put something in my drink.”

I nodded, “I knew it was safe but not if it would work.”

Mom laughed, “don’t go giving those out to guys.”

I shook my head, “I had to cut the formula so it wasn’t so strong. I will only give them to girls.”

She smiled and then grinned, “Leave one out for me.”

I looked at her as she blushed, “Patrick is coming over.”

I grinned and nodded before finishing my dinner. I went to bring mom one of the milder pills and she started to take it. I caught her hand, “Wait for Patrick unless you want me to fuck you until he gets here.”

She grinned and caressed my cheek. Thirty minutes later I was doing homework when Patrick arrived. Fifteen minutes later mom pulled him past my door, “When your done, clean up and go to bed!”

I grinned and turned to finish what I was doing. Mom’s loud wails and howls began several minutes later. When I walked into school, guys and girls greeted me. Guys were slapping my back and girls kept smiling. I met Mary and the other girls for lunch and she grinned, “everyone is talking.”

I looked at her and then around the busy quad, “About me?”

They grinned and Lynn bumped my shoulder, “Trevor’s girlfriend had a great time and told all her girlfriends who spread it around.”

I glanced around, “did she tell them I would only give the pills to girls?”

Tasha laughed, “Yeah and we have a list of girls that want a pill.”

I pulled the small container out of my pack, “send them to me and I will give them out.”

I looked at Mary, “You didn’t happen to talk to her and ask her how she felt and...”

She grinned, “I’ll ask so you can do your study.”

Tasha, Devon and Lynn laughed and I blushed, “I just want to be sure it works.”

They grinned and started talking. Several girl came over as if to talk to one of the girls. Mary or one of the others would let me know if they wanted a pill and I would hand them a couple, I always told them to only take one. Lunch was almost over when one of the teachers stopped beside us. She looked around and almost whispered, “I heard you had a pill that would help a women... enjoy sex.”

I glanced at Mary who nodded. I put a few pills in her hand, “It is very important to only take one.”

She was blushing, “How much?”

I frowned, “how much what?”

She looked at me, “Money.”

I looked at Mary, “I don’t want money. I just want to know how you feel and what happens.”

The teacher smiled, “I’ll let you know tomorrow.”

She walked away as the bell rang and we went to classes. The walk home was full of the four girls laughing and giggling. After we got home Devon started undressing before we even reached my room, “I want the stronger pill Adam.”

I looked at Mary and then at Tasha and Lynn before going to my desk. I handed the pill to Devon and she put it in her mouth before starting to undress me. She sat on the bed and pulled me down beside her, “How would you like four girlfriends Adam?”

I looked at Mary and she grinned, “I’m okay with it.”

I looked at Tasha and Lynn and they smiled and nodded. I smiled at Devon, “Okay.”

She grinned and I stood to push her down on the bed. She protested, “I’m not...”

I put my hand on her pelvis, “I want to watch. Your public area is starting to get puffy which means it is getting more blood.”

Devon sat up to look as the other girls moved closer. I absently rubbed her pubic mound and then down each side of her slit as her pussy opened, “see how it looks fuller?”

Devon shuddered and then groaned, “It feels itchy.”

I rubbed her and she jerked and shuddered before looking at me, “put your finger in.”

I slipped a finger into her and she shivered as her hips lifted, “mmmm!”

Tasha bumped my shoulder, “lick her.”

I smiled, “Have you girls thought about doing that to each other?”

They looked at each other and blushed. I smiled, “Sex is sex. I’m make another batch so you can try it together one time.”

I turned as Devon started squirming and moved down her body. I started licking through her wet pussy as she started lifting her hips. I nibbled on her labia and pushed my tongue into her before teasing her clit and sucking. She arched her back and squirted and screamed and shook, “YYYYYEEEEESSSSSSS!”

She bucked and jerked and twisted so I stopped and moved over her. I kissed her before lifting up as she fumbled and desperately pulled my cock to her pussy. I pushed into her before starting to fuck her with deep thrusts. When I hit the back of her pussy I pressed and humped. Devon stiffened before going wild, she bucked and thrashed around as her almost hot pussy grabbed my cock, “FFFUUUCCCKKK.... MMMEEEE!”

I fucked her hard for another couple of minutes as she continued to writhe and squirm. She kept squirting as her pussy spasmed and milked my cock. I pushed into her and forced her cervix opened as I began spewing a stream of cum. She lifted and tilted her hips as her pussy clenched around my cock, “I’M CUMMING!”

She squirted several times as I kept pumping cum into her. She was shuddering hard when I stopped and kissed her. I pulled out and rolled her over before spreading her legs and moving back between them. I shoved into her and she screamed as she started thrashing around, “YYYYEEEESSSSSS!”

I fucked her over and over before stopping as she panted and shuddered. Mary, Lynn and Tasha were sitting together talking as if nothing was happening. I caressed Devon’s slimy pussy, “how was that?”

She sighed, “That best thing in the world.”

The other girls turned to look and then grinned as they stood. Mary helped Devon up, “Make the other pills and we will try them this weekend.”

Tasha and Lynn were nodding and Lynn gave me a kiss, “make some more of the weaker pills for school tomorrow.”

I slipped my pants on and walked the girls out before going to my lab. I made a batch of quarter strength and another larger batch like before. Mom smiled when I walked into the kitchen, “Patrick is coming over.”

I grinned as I sat to eat, “How was last night?”

She grinned as she blushed, “very good.”

After dinner I cleaned up as Patrick arrived and mom took a pill and led him back to her bedroom. By the time I finished cleaning the kitchen mom was howling. My weaker pills were a huge success. Mary, Tasha, Devon and Lynn live with me now. We have a fun and extremely enjoyable sex life with several children.
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