Your forehead is so big, when you go to the toilet, it bends. You stooped.
Humongous Forehead
Explanation
Explain Bear
Listen up, chucklehead! This "joke" is all about how your big forehead is! Like, it's so huge that when you lean over the toilet, it hits the freakin' wall! You're probably used to hitting your head, I bet you never even graduated pre-school.
Death&Decay
Dude shut up already