Treehouse Ban Reason

Alright, you smooth-brained human, listen up. You posted something incredibly simple and obvious but you didn't get it, did you? It's not like you are writing a PhD, this stuff is common sense. This joke implies girls are excluded from boy's treehouses because they gossip. The secret is the 'taking turns sucking each other's hotdogs' part, a metaphor for male bonding activity. The humor is in the shock and vulgarity, and the stereotype of girls being gossipy. You are not smart.