("`-''-/").___..--''"`-._ `6_ 6 ) `-. ( ).`-.__.`) (_Y_.)' ._ ) `._ `. ``-..-' _..`--'_..-_/ /--'_.' ,' (((' (((-((('' (((( K R I S T E N' S C O L L E C T I O N _________________________________________ WARNING! This text file contains sexually explicit material. If you do not wish to read this type of literature, or you are under age, PLEASE DELETE THIS FILE NOW!!!! _________________________________________ Scroll down to view text -------------------------------------------------------- This work is copyrighted to the author © 2008. Please don't remove the author information or make any changes to this story. All rights reserved. Thank you for your consideration. -------------------------------------------------------- Term Paper by Old Bill (address withheld) *** A boy's pretty sister uses him as a model for her human sexuality research paper. (mf-teens, youths, voy, no- sex) *** I was reading The Red Badge of Courage when my 16-year- old sister came into my room without knocking, as usual. When I wanted to jerk off I had to make sure she was not home since the door didn't lock. "Hey dork," she said gaily, and I saw she had her little digital camera in one hand and a white, plastic ruler in the other, "I need a favor." I loved to watch the way her parts jiggled and moved under her clothes. My sister is a total fox. I put down my book and smiled at her. She was very easy to smile at. My sister was at least cute and probably closer to beautiful. She has a very busy social life, hooking up with lots of guys, and I suspected that she was, as they say, sexually active, but until this day I was not sure. "This will only take a minute, honest," she said, grinning. "Stand up and drop your pants." "What?" I said rather loudly. "Come on, Billy, I need some pictures for my reproductive system report. It's important, term paper, you know, final grade." "Some pictures?" I said stupidly. "I looked on the Internet, and I can't find three or four pictures of the same penis at different stages of arousal." She sighed theatrically. "Pictures, you want to take pictures of my, my..." "Yes, dummy. You do have one don't you, most boys do so I've been told." I just sat there shaking my head and feeling embarrassed. Many times, more than I will admit here, I have pictured my sister spread out and bare when I masturbated, pouring out my spend on her big jugs, spurting in her sucking mouth, only in my mind of course. "So stand up, little boy. Here, take this ruler. Take off your pants and hold the ruler beside your thing." She turned on her camera and stood waiting. When my sister is waiting, it shows. Patience is not her main virtue. She even tapped her foot. "You are flat out crazy," I said, looking at her wearing her impatient face, one hand on her raised hip. "Do you want me to show Mom your magazine collection?" she asked nodding toward my closet where I had a hoard of old Playboys and a few SI swimsuit issues, some of them semen stained, all of them dog-eared, a lot of them with naked girls that looked something like her. "Please Dorrie, I can't; honest I can't," I felt myself blushing. "Sure you can. Nobody is going to know it's yours. I'll just shoot ultra close ups. Please Billy. I'll owe you one. I have to get this finished by Friday, and I need a good grade. Pretty please." She batted her eyes at me, and I gave up, trying not to see her nipples poking at her thin shirt. She looked so sad, so lovely, so sexy, so eager or something. I stood up and peeled off my shorts and boxers and took a deep breath as she went down on one knee, adjusted my desk lamp so it illuminated my groin and bit at her lower lip, squinting in concentration, turning her head to the side. I put my hands on my hips, holding my t-shirt high and made myself think of nothing, looking at the doorway. "Perfect," she said, "it's really small, all wrinkled up, only about a inch, about the size of my thumb. Hold the ruler on your thigh, right there." She put it where she wanted it, her hand grazing my balls. "No, that won't work. Your fingers cover the numbers." She grabbed my roll of Scotch tape and taped the ruler to my thigh with the top end right up by my balls, poking me in the crease, holding my scrotum on the back of her hand while she adjusted the ruler, then got back on her heels, aimed her tiny camera and fired three or four shots. She looked up and smiled at me. "Now make it bigger, a little bigger. It's already poking out some like a turtle's head." She prodded it with a fingernail and I jumped. "How?" I asked, feeling a mix of anger and embarrassment. I mean a lot of guys had seen my prick in the showers and stuff but no girl ever had and here was this pretty girl smiling up at me even if she was my sister, a foot away from it. I mean I was proud of it and all, but I didn't like the idea of showing it off. I tensed my abs and shook my hips. "Yeah," she said, "like that. Good, good." And she took some more pictures. I looked down and the stupid thing had swollen up a couple of inches and hung down between my legs, kind of twisted but definitely fatter. I could feel blood pouring into it; at least that's how it felt. It quivered and the head moved side to side. "Shake it," my sister suggested. "I want it at rest, aroused, tumescent and erect; at least four stages. How big does yours get?" "I never measured," I lied to her as I reached down, grasped my tool and shook it back and forth a few times, slapping my thighs with its bullet head. It grew so it was maybe four or five inches long and getting fat too, but still just hanging there, limp, arched out some over my balls. I took my hand away and she got closer with her camera. "Thanks," she said, smiling and taking more pictures, only a foot or so from my tingling cock. I tried not to get excited, but I felt my heart beating harder and my testicles throbbing. "It's almost down to the five, and I think it's still growing." She took two or three more, moving slightly left and right. "Hold it still," she said and then she laughed and looked up at me while my prick jumped. I held my hands behind me, resisting temptation. "What's tumescent mean?" I asked, trying to breathe normally, tensing by groin, feeling my balls swelling. "I don't know exactly. It's the term the books use. I think it means full of blood, maybe excited." She reached out a hand and grasped my swollen rod, and I squealed. "Don't be such a baby," she said, as she stroked down and down and down, from the base to the head, gently but firmly, raking with her fingernails. "You're getting there." She backed away and took some more pictures. "I may have to move the ruler 'cause it's getting fatter." I looked down and it was really long and growing hard, jumping around but still hanging, looking like a piece of pipe or garden hose. I'd swear it was halfway to my knees and the veins on it were pulsing, the head twitching, and it was kind of bulging out over my scrotum which was also swelling, getting rounder. "It's almost six," she said, "no, it is six. That's above average you know?" She looked up at me and smiled, reaching out to touch the ridge of my cock head and move her fingers around as if she were unscrewing it. "Does it like that? Damn," she said when it jumped but did not rise. She flicked it with her forefinger and I jumped and yelled something. "I'm sorry," I said, reaching down to stroke the dumb thing and poke at my balls. It was hot and heavy, but I certainly was not excited, not really. I held it in my hand like I was weighing it and bounced it a few times. I was really embarrassed as I stretched it out, using both hands. Flabby was the word for it, like a big, wet noodle. My sister put down her camera, went to my closet, grabbed a couple of magazines and flopped out the center spreads on the floor in front of me, a pair of naked blondes with impossible breasts and no hips. "Come on," she said with a wide smile, "use your imagination. I just need the last stage, the erection. Wait a minute." She peeled the sticky tape off my leg and then attached the ruler to my dangling cock with a couple of strips of tape. "It's almost six and a half, maybe seven," she said. "That's terrific. I didn't know you were so well developed, I mean endowed. Now look at those sluts, think about what you want to do to them." Nothing, absolutely nothing. My head refused to cooperate. I could sometimes think it hard when I lay on my back, but not this time. Talk about embarrassed. I just couldn't get it up. "It's shrinking," she said loudly. "Don't do that. Come on, you quitter!" She put down her camera, stood and stripped her faded polo shirt over her head and tossed back her golden hair. No bra; I had been right about that. I stared at my sister's bare breasts jiggling there right in front of me, the nipples pink and upright, the jugs as big as softballs, and I felt my penis hardening and rising, my palms itching to grasp those beauties. I put my hand down on my scotum and squeezed. It had gotten hard and round, up tight at the base of my penis which was still swelling and getting stiff and jumping about like mad as it rose. I felt a bead of pearly pre- cum oozing out and sucked in my belly while Dorrie took pictures from several angles including two or three with one of her boobs right on me as she shot down at it, the camera at my belly button. Then the tape snapped and peeled off and the ruler dangled down. I pulled it free and held it under my rearing cock which was sticking straight out in front of me, looking like a tent pole or something. "Eight plus," my sister said. "Wonderful!" She handed me the ruler. "Hold it there, right beside it. Almost nine. Put it on the side, dummy. Its curved isn't it?" She adjusted the light and knelt again. "It's beautiful, Billy, just beautiful." She reached out a hand, pulled the ruler free and brought my long rod to her lips, kissed it and licked it. Up it rose, pointed at the ceiling, the way it gets when it's fully engorged, really excited, close to coming. I whimpered as she picked up her camera and took several more shots as my stiff member jumped up and flexed, seeking friction, bubbling out goo. "Thanks," she said, picking up her shirt and bra and hurrying away. "You were great." She closed the door leaving me with a painful erection and very blue balls. I grabbed a couple of tissues and sobbed with relief when I came, shuddering, sobbing as quietly as I could. It was the most exhausting climax I had ever experienced. I was emptied, maxed out, down on my knees. After supper she came to my room again, tossed me a stapled paper and said, "Proofread it, dork. You're good at that." She flopped on my bed and lay back on my pillow. "Tell me what you think. I think it's really good. And I need an A. Mark where you find mistakes." It was about ten pages double-spaced so not much to read but on every other page there was a 4x4 picture of my penis with a caption under it. The lighting was good and my pubic hair looked heavier than it really was. I was surprised how the shape of my ball sack changed. I had not been aware of that until the very end. It really did get big in her pictures, like the size of a baseball or something. But my cock was the star, and I had to admit it looked good, strong and hot, and the ruler helped too. "It's good," I told her. "Clear and concise, no wasted words, answers the question. I'd give you and A." "How'd you like the pictures?" "You were right. They sure do help. You've actually illustrated six stages haven't you?" "Um," she said. "I was tempted to get a picture of you ejaculating, but, well you know, that might have been asking too much." She sat up and smiled at me. I laughed. "Now what are you going to do for me?" She stretched out a hand and I gave her the paper. ""There are a couple of typos, things the spell checker missed, wrong words." She smiled at me. "If I get an A on this thing, two people are going to lose their virginity at the same time." She hurried away, not bothering to close the door. My cock jumped. END ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ This story was written as an adult fantasy. The author does not condone the described behavior in real life. ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Kristen's collection - Directory 58