When you take a shit, then hours later your asshole starts to itch and you have to go wipe again.
Walter: "Yo man, you seem like something's bothering you."
Hank: "Yeah bro, I'm a little down in the dumps cuz my B-Hole itches so bad."
Walter: "Aww cheer up man, just go take a Mulligan."
Hank: "Word to your mother! I'll be right back!"