Because the pee is silent.
I dino-bore! . I'm sorry.
Oops, this was supposed to be for . There's no punch line!
She was all dressed up with no place to go!
Poop: Please don't push. It's already tight in here! Poop to Pee: May I go first? Meanwhile, Fart pushing everyone to the sides.. Fart: Excuse me! Excuse me! I need to go!