"Cool, dudes! I am buffed up! I so want to have sex with a girl!" Sam was acting just like an adult now. He kept admiring myself and looked at his leaking dick. "Cool! My first erection!" "Look, he even knows what adults know." Nick told Marcus. "Yeah. It makes me glad I'm the big brother. Oh well. Too late." Marcus answered back. "Come on big bro! I need to fuck a girl so bad." "Yeah, yeah Sammy" Put some clothes on and we're going to our girlfriends house. They have a three year old sister. We're gonna put shampoo on them." In case you were wondering, our girlfirends are sisters and they have a young sister that's Sam's previous age. We waited for Sam to get on clothes and left. When we got to our girlfriend's house, Marcus rang the doorbell. Her girlfriend Lisa answered the door. "Who are you?" "Lisa! It's me! Marcus!" "No way! Marcus is my age, not yours." She was about to close the door, but Marcus said, "Wait, wait, wait! You have a mole on your butt, but that doesn't matter." "Marcus?" She finally realized who he was. "Who's at the door?" Nick's girlfriend Marissa asked. "It's Marcus. He grew up somehow." "And I'm Nick and that's Sam." Nick added. "No way! What the hell happened to you guys?!" "That's not important right now! Get your little sis, Judy. Have we got something to show you." Sam said. After all three girls had gathered, we got out the soap and water. "Now here goes. Don't be scared, but this will make you feel great" Marcus said. We proceed to put the soap on and the changes began.