A husband exclaims to his wife

A husband exclaims to his wife one day,

“Your bum is getting really big. It’s bigger than the BBQ grill!”

Later that night in bed, the husband makes some advances towards his wife who completely brushes him off.

“What’s wrong?” he asks.

She answers, “Do you really think I’m going to fire up this big-bum grill for one little weenie?