South Park: Season 4, Episode 5

4 - 5: Cartman Joins NAMBLA

Cartman thinks he is too mature for his friends, so logs onto the Internet to find some adult companionship. He joins the North American Man Boy Love Association, and soon has an older friend who is looking for a "special" relationship with him. Not to be outdone, the other boys soon find older friends, too. Kenny discovers that his mom is pregnant, and tries to make her have an abortion.