Bi-ology 101
by Master Jonathan
Copyright© 2021 by Master Jonathan
Erotica Sex Story: Amy and Cheryl had known each other for years but one day when Amy was having trouble with her biology class, she asked Cheryl for help. Cheryl showed her things that weren't in her textbooks!
Caution: This Erotica Sex Story contains strong sexual content, including ft/ft Consensual BiSexual Fiction School Anal Sex Masturbation Oral Sex .
I was 17 the year it happened. I had known Cheryl for several years, it seemed like she had always been around. We grew up across the street from each other on the same cul-de-sac. We were the only kids on that small street, so it was like our own private playground. Our folks were good friends, so we were always at each other’s houses. It was a pretty wonderful childhood.
Childhood grew into the teen years, and grade school gave way to high school. We took some of the same classes and would help each other with our homework quite often. We seemed to work good together too, the subjects I had trouble with, she seemed to know and vice versa. It was during one of these “study sessions” that I found out just how good a friend Cheryl could be.
I have always been terrible at biology. I just never could remember all the anatomy terms and definitions. But Cheryl was fortunate enough to be pretty good with that sort of memory recall. So one day when I was having trouble with my anatomy homework, I went over to her house so she could help me finish the damn homework!
It was a Thursday night, I remember that because it was our parents bridge night. Every Thursday, our parents would go out and play bridge at one of the players house. The location of the game rotated around the players houses, each player hosting the game one night. And this Thursday was one of the other players nights to host.
I went over to Cheryl’s house just as our folks were leaving. They left the house around 7:00 and wouldn’t be back until well after 1:00 am usually, leaving us alone for several hours to “study”.
I was wearing my typical springtime wear: a bikini top and cutoff jean shorts. I didn’t have any panties on, I never wore panties at home. I hated wearing the damn things period, they were always in the way and they made me sweat down there.
In southern Georgia where I live, the temps average 85° to 100° with 70-90% humidity, so it can get quite uncomfortable wearing too many clothes. So if I could get away with it, I went without them.
I went over to her house just after our parents left for their bridge game. I rang the doorbell and she opened the door. She is wearing a old oversize t-shirt and sweatpants.
“Hi, Cheryl”
“Hi Amy, how are you?”
“Fine.”
“I need your help! I am failing biology really bad. If I don’t pass, I won’t graduate. And I know you are a whiz at this crap, so I thought you could help me,” I said.
“Okay. Come on in,” she said. I smelled her perfume as I walked behind her through the house to her bedroom.
“That perfume of yours sure is nice. What is it?”
“Oh, it’s new, it’s called Forbidden Passion,” she said.
“Forbidden Passion, I like that,” I said.
“Take a closer smell. It is a completely beautiful scent,” she said, smiling. I came closer and took a long sniff at her neck. I lingered there for awhile taking in the arousing odor. She moved away and asked “Penny for your thoughts?”
I shook my head to break myself from the trance. “I ... I ... I ... what an intoxicating smell! It makes me feel...”
“I know! I hope it does the same thing to the boys at school too!” she said with a wide grin.
“So what do you need help in anyway, Amy?”
“Oh, anatomy. I just don’t understand it at all. I can’t remember all this stuff!” I replied as I sat down on the chair and pulled out my books.
“Come and sit down here,” she said, patting the couch she was sitting on. I quickly sat down beside her. She put her hand on my leg, nonchalantly, as she continued asking about my biology problems. I sighed under my breath and I could feel my cheeks turn red. She moved her hand up my leg a little more and I moaned out loud.
Shocked and a bit embarrassed, I said “Cheryl, what are you doing? I ... we ... we ... can’t do this!”
“Do what?” she replied innocently.
“You know ... your hand was on my leg.”
“Was it?” she said.
“Yes, oh I’m sorry, I thought you were coming on to me for some reason.”
“Amy, I am shocked.”
“I’m sorry, lets get back to work,” I sat back down beside her and she started explaining something, I’m wasn’t listening. I was staring at her lips, they were so sweet, so kissable. She again placed her hand on my knee. She paused, but continued talking. Her hand slid up my leg again and stopped at my thigh. I stopped her and looked at her.
“Your hand is on my leg again,” I said. This time she didn’t take it away.
“Do you want me to remove my hand?” she asked.
“I ... yes. No ... I don’t know,” I answered, obviously confused and unsure of what’s happening. My head was fuzzy and I wasn’t thinking clearly. I was hot and my heart was racing.
Cheryl slid her hand up all the way to my breasts. “You’re not wearing a bra, Amy.”
“I ... I ... I never do at home,” I replied, all flustered.
“Am I getting you horny?” she asked.
“Yes,” I replied quietly.
“Look at me Amy. Tell me how much it turns you on.”
I looked at Cheryl helplessly and awkwardly said “It felt odd, but my ... my...”
“Your pussy?” she prodded.
“Um ... yeah ... my pussy is tingling.”
“Are you a lesbian?”
“No!” I replied adamantly. And that’s true. I had always been boy-crazy and never even considered myself bisexual much less lesbian. This whole experience had me so confused and at odds with all I had known before.
“Well, why are you so horny right now?” Cheryl persisted.
“I ... I ... don’t know. This has never happened before.”
“Do you want me to eat your pussy?”
“No, I ... I ... I am so confused,” I replied shocked, yet oddly excited.
“Ask me to eat your pussy Amy,” she demanded.
“Uh, Cheryl,” I said hesitantly, but extremely horny and trying desperately to control my hormones “Would you, umm, would you eat my pussy? No, wait, why did I say that?”
“Oh Amy, do you really want me to suck on your pussy? To lick your box? To fuck your juicy pussy with my tongue?”
“Hmmmm, yeah, no, I ... I...”
“Amy, beg me to eat your pussy.”
“Hmmmm, uh ... oh please, Cheryl, come and eat my pussy, please I need to cum so bad.”
In retrospect, I probably should have waited until after my homework was done before I watched those porn clips on the computer. But I knew my B.F.F. would help me with my homework and I didn’t understand any of what I was reading anyhow. Only now those porn clips had me so horny I was about to bust. And Cheryl was here ready to help me do that very thing!
“Take off your shorts,” she said. I quickly took off my shorts. The fact that I wasn’t wearing panties kind of surprised Cheryl. She grinned widely.
“You’re not wearing any panties. You must have been expecting me! Rub your pussy, bitch!”
Without hesitation, I slid a finger to my clit and rubbed myself frantically. I moaned loudly, temporarily forgetting that Cheryl was watching me just a few inches away. Cheryl was completely turned on watching me finger myself. She got on her knees and opened my legs wide.
She moved her head towards my pussy and I was surprised when she shoved her face into my pussy. She began sucking and licking my pussy as I continued to rub my clit faster. She slid a finger into my pussy as she licked me and I began to buck my pussy on her face. Man, she was good! She set my pussy on fire. She slid her finger out of my pussy and I whined and moved my pussy towards her finger.
“Put it back in, hurry please!” I cried deliriously.
I was horny as hell and I needed to cum. I had to cum. Cheryl smiled as she put her finger at the entrance of my pussy. I quickly pushed forward and her finger went deep into my dripping pussy. I fucked her finger passionately and intensely as I came all over her finger. She then moved her hand to my ass and placed her finger at my anal entry.
I looked at Cheryl confused and asked “What you doing?”
“Ever thought about having something up your ass?”
“Um ... not till now.”
“Really? Beg me to finger fuck your ass. Convince me that you really need it.”
I turned all flushed again, but my sexual urges took over again and I begged, “Oh pleeease Cheryl, fuck my ass with your finger. Fuck it hard and fast. Please penetrate my ass now.”
She granted my wish and slid a finger slowly into my ass. Usually the first ass fucking hurts, but I was so horny that I had a huge orgasm right on the spot and cum dripped from my pussy as Cheryl started to slide her finger in and out of my tight ass.
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