Plastic surgery ??

A woman in the bar says that she wants to have plastic surgery to enlarge her breasts.
Her husband tells her, "Hey, you don`t need surgery to do that. I know how to do it without surgery."
The lady asks, "How do I do it without surgery?"
"Just rub toilet paper between them." Startled the lady asks, "How does that make them bigger?"
"I don`t know, but it worked for your ass."