An old man was 89-years-old and he wanted to marry a 24 year old girl.
His son told him, "You can't marry a 24-year-old girl."
He said, "Why not?"
The son said, "If you marry a 24-year-old girl, you'll have to have sex with her and that could be fatal!"
He thought about it a moment, shrugged his shoulders and said, "Well if she dies, she dies."