"What are you doing in my room?" your big sister, Zoey, asked. You didn't know who else to turn to. After the boys at school found out you were still a virgin, they started picking on you. "It'll happen when it's the right time," she told you. "Quit worrying about it, don't let it bother you - you have lots of time." "I guess you can ask me questions if you wanna learn about sex," she said, but you had a different idea. "How am I supposed to help you? Body swap? That's not a real thing. Little brothers and their imaginations..." You had been hiding something behind your back and now it caught your sister's attention. "What's that behind your back?" Zoey asked, so you opened your hand and showed her the magical amulet. "What is this thing? What's it supposed to do?" She put her hand against it and it began glowing and pulsating in your hand. Suddenly a huge blast of energy pushed her back and you two had swapped bodies. "Whoa!" you said now inside her body. "It worked! Look at that, I'm in my sister's body, I can't believe it. Do you mind if I...you know...just explore a little bit? I think it would help me learn a lot about girls. This is the best way for you to teach me, don't you agree?" You were excited to see what was underneath your sister's clothes. She was hesitant to the idea at first, but she finally warmed up and let you examine and explore her body. "They're squishy and soft," you said with a smile, your hands squeezing and groping her big, perky tits. "Look, I'm touching your boobs! I can't stop touching these things." "How do I take it off? I want to see what's underneath," you asked Zoey as you struggled with her bra. "Do all girls wear stuff like this underneath their clothes?" You stripped out of her clothes and sat naked in front of her. "Can you teach me how to play with it?" you asked, your finger touching her pink pussy. "Because whenever I finally lose my virginity, I wanna do a good job and make sure the girl likes it." Zoey instructed you to spit on your hand and to rub your clit in circles - this is how girls masturbated. "Is it weird if I touch my own dick?" you asked shyly. "I wanna know how sex works, though. I know it has to be hard." You wrapped your hand around your own dick and your sister instructed you how to stroke it from inside her body. "What's the best position?" you asked once it was hard. "Missionary is easy to learn? What do I do? Lay back, okay." Since Zoey was in your body, you had her penetrate with your dick. It felt amazing. On top of that, you finally got to lose your virginity, even if it was inside someone else's body. "It feels weird to get filled with cum..." you said, "it's warm, though. What is that called? It's called a creampie? I like creampies!" "Can I just stay in your body for a while?" you asked. "I'll give it back later, I promise. I wanna play with this for a while." You loved being inside your sister's female body - it was so much fun. Everything was so different from your male body. "You're a good teacher," you smiled at Zoey, "thanks for being a cool sister."