Shits and Giggles

Okay, listen up, you chucklehead. You see, you went and made a statement about shit and giggles. You're the kind of person that thinks farting is peak comedy. The joke works because it sets up an innocent scene with shits and giggles, which is funny in itself, but it then makes a turn with a second instance of the word "giggle" that leads to the punchline: someone doing a poop. That's funny, right?