Improvised Sex Ed (Fiction)

When I was younger, I lived next door to a girl named Katie. Even though she was a few years younger than me, I considered her a close friend. It probably helped that our parents had known each other since they were in college. This story happened on an evening when our parents had gone out together. I was bored, and figured Katie would be too, so I decided to go over to her place and surprise her. I knew where her family kept their spare key, so I just let myself in. When I got upstairs, I saw her room door was closed, and I could hear her moving around inside. I guess I didn't have the best manners back then, because I swung open the door without knocking. Whatever I was planning on saying died in my throat when I saw her. She was lying on her bed, on top of the covers, with her shorts and panties around her ankles while her hands massaged her bare crotch. She screamed when she saw me, and I quickly slammed the door shut, apologizing repeatedly. I tried not to think about what I had seen, but the image had seared itself into my brain. I had just walked in on little Katie masturbating! I hadn't really had time to see much, but at that age even the barest hint of skin was enough to make my cock stiffen. I had never felt any kind of attraction to Katie, as I thought of her as a kid sister, but I couldn't stop myself from picturing what she must look like fully naked. After a moment of nothing but silence, I decided to knock. "Can I come in now?" I asked gently. "Yes," came the reply, but I noticed her voice was trembling, near tears. As I entered the room, I noticed her face was as red as my own must be, and she was blinking back tears from her eyes. Neither of us said anything for a moment, and then she just let it all out. "Please don't tell my parents!" she said. "It's the first time I've ever done something like that, and I promise it'll never happen again! I don't wanna get in trouble!" "It's okay," I reassured her, "I'm not gonna tell anyone. We'll keep this just between you and me, alright?" "But... aren't you grossed out? Or mad?" she said. "No. What you were doing is perfectly normal. Everyone does it!" "They do?" she asked, and I nodded. She was silent as she thought about this new information. "Does that mean you do too?" Well now I had trapped myself. I couldn't say no and make her think I had lied. But saying yes could open up a whole other can of worms. After a moment's debate I decided to tell her the truth, that I did it very often. This erased all the worry on her face. "Really? Thank God! I thought I was some kind of sicko. It's just, after Tommy from school showed me his privates the other day, I've been feeling really weird whenever I think about it, kind of like there's an itch 'down there'. When my parents left earlier, I thought I should see if I could get rid of it. It felt... weird, but in a good way. I didn't wanna stop." She really had no clue what was going on with her body, so I took it upon myself to explain to her what sex was and how it wasn't just for making babies, but also for making people feel good. Then I went on to explain that you could make yourself feel like that on your own, which is what she had been doing. When I was done explaining, I asked if she had understood everything. "Kinda," she replied. "What do you need help understanding?" I asked. "Well, it's just that... I've only seen a penis once, and it was really quick. I think, maybe if I saw another one, I'd be able to understand everything you told me." The whole time she was speaking, her face just kept getting redder and redder. My cock was getting hard again. Was she really suggesting what I thought she was? Normally, I wouldn't have even entertained the idea, but seeing her playing with herself earlier had made me really horny. "Okay, but you have to promise not to tell your parents, alright?" She just nodded. I decided to start stripping with my shirt to give her time to change her mind. But she was determined to see it through, and her gaze was fixed on the tent in my pants. The jeans were the next to go, and then I was standing in front of her in just my underwear, my cock straining to get free. Here goes nothing, I told myself as I removed my underwear and let my cock spring upright. "Wow! It's so big!" This flattered me even though I knew she wouldn't be saying that if she had much else to compare it to. Then she surprised me by taking off her shirt. She wasn't wearing a bra, as there wasn't really anything for it to cover. Even so, the sight of her bare chest with nipples pointing out was the sexiest thing I had ever seen. "What are you doing?" I asked as she took off her pants. Now the only thing between me and her pussy was a pair of white panties with flowers on them. "I just thought it wasn't fair to make you do it alone. Is this okay?" I just nodded, and off went the panties. And there, out for the whole world to see, was her cute hairless slit. Before I could stop myself or even ask for permission, my finger was tracing it from top to bottom. Her whole body shivered at the contact. "Wow! It feels even better when you do it!" she said. I kept going at it as I felt her breathing picking up. I had no idea girls got so wet! Then, Katie let out an involuntary gasp, and I knew I had found her clit. I kept circling that spot until her whole body tensed up, and then I watched as the naked beauty in front of me had her first orgasm. Knowing that I had been the first person to make her feel that way just made me hornier, if that was even possible. Once she had calmed down, it was my turn for some attention. I was fully prepared to take care of myself, but she surprised me by taking my cock in her hand. She started stroking, up and down. She was a natural, and I knew I wasn't going to last long. It was looking into her eyes that finally sent me over the edge. Seeing that look of pure lust was too much, and I started spurting cum onto her nearly-flat tits. Not wanting to leave her with the mess, I cleaned her up with my tongue, taking extra time to tease her little nipples. This made her giggle, and when I was done, she planted a kiss firmly on my lips. "Thanks so much for teaching me about that!" she said. I smiled and said, "I can show you more later, if you want."