I am sooo into Cartman peeping through Kyle's window so that's where I'm going with this to make it Kyman related. I made it a bit kyle/rest of m4 but kyman focused. Kyle is a horny teenager and is discovering new ways of releasing all that tension. One night while he's rubbing himself, he imagines himself sitting on one of his friend's laps. His mind cycles through all three of his closest friends and how they would react to him. In order to make it more real, he pulls on of the thicker pillows from his bed and straddles it. Stan would look down at him lovingly, maybe place his hands on Kyle's hips, slowly rubbing up and down his body. He can easily imagine the dopey and lovestruck expression on Stan's face. Shifting his thoughts to something more exciting, he imagines Kenny instead. Kenny would be a little rougher with him, but still gentle. He would grope at his ass and thighs while Kyle pushed his groin into Kenny's slender thigh. When Kyle found the right spot and started getting vocal, Kenny would pull his hips down hard to make it more intense. All of this wasn't enough to get him off, so he pulled another pillow from the head of his bed and pushed it next to the other one that now had a sizeable wet spot. He thought about what Cartman might do and say to him. He might call him pathetic for humping his leg like a dog, so desperate to cum that he was willing to degrade himself like that. He would dig his fingers into Kyle's hips until they left marks, but Kyle likes the pain. When he comes, he can't help but shout Cartman's name while it happens. Cartman, who has been watching from the window since before Kyle mounted his pillow, falls off the ladder from surprise when he hears this. He breaks his dominant arm in the fall and can't properly jack off to the memory until it heals. I think it would be so funny if he got so horny and angry that he approaches Kyle one day like "This is your fault and you have to take care of it."