South Park - Season 4 Episode 16
The Wacky Molestation Adventure

The "Raging Pussies" concert is on! Kyle calls the police and say his parents have been "molestering" him. Soon all the children are calling in on all the adults in South Park. Until only children live in South Park. Someone from out of town breaks down and they have the task of retrieving a book for the fat-ass. The locked-up adults of South Park get therapy to prevent them from sexually abusing their children.