A woman says to her husband

A woman says to her husband that she wants to have plastic surgery to enlarge her melons.

Her husband tells her, “Hey, you don’t need surgery to do that. I know how to do it without surgery.”

She asks, “How do I do it without surgery?”

Her husband answers, “Just rub toilet paper between them.”

“How does that make them bigger?”, she asks.

“I don’t know, but it certainly worked for your bum.”