Little Timmy walked in on his parents having sex.

“Timmy! Close your eyes and leave!” Timmy’s mom yelled.

“But… what were you doing?” Timmy asks.

“Well, your father has big beer belly, so I was jumping up and down on him to flatten him out!” The mother responds, nervous.

“Well, there’s no use in that.”

“Well, why not?”

“Because when you’re out shopping, the lady next door comes in and blows him back up!”