Two elderly gentlemen were talking together.
"I guess you’re never too old," the first one boasted. "Why, just yesterday a pretty college girl said she’d be interested in dating me. But to be perfectly honest, I don’t quite understand it."
"Well," his friend said, "you have to remember that nowadays women are more aggressive. They don’t mind being the one to ask."
"No, it’s not that ..."
"Oh. Well, maybe you reminded her of her father."
"No, that’s not it either. It’s just that she also mentioned something about carbon 14."
From Paul Decker’s Sermon: What a Way To Go!