sorry I don't have a link but I read a fic once where kyle was in cartmans room as cartman sat in his desk chair he convinced kyle to hump his fat thigh and refused to let him use the bathroom so kyle pissed himself on cartman's thigh and kept humping it until he came and cried during it and cartmans thoughts were about taking 24 hours to turn kyle into his sex slave as long as they stayed in his room