The Missing Bum

Troy: “Why do we have bums?”
Me: “What would you sit on if you didn’t have a bum?”
Troy: “My legs.”
Me: “Those are just bones. That doesn’t sound comfortable. That’s what a bum is. It’s like a built in pillow for us to sit on. And on a side note, some people also think they’re cute!”
Troy: “That’s true. Babies have cute little bums.”
Me: “So do you, now get dressed!”