Quote from : Slaughterhouse-Five Book

I’m going to lose weight for you,” she [Valencia Merble] said. “What?” “I’m going to go on a diet. I’m going to become beautiful for you.” “I like you just the way you are.” “Do you really?” “Really,” said Billy Pilgrim. He had already seen a lot of their marriage, thanks to time-travel, and knew that it was going to be at least bearable all the way.