Three times - Once when you tell it, once when you explain it, and once when she gets it.
Explaining his wife.
A joke.
Because, time will always tell.
You've gotta be kitten me. You can SPEAK?!?
Jane: I can't answer. I didn't know I was supposed to keep count!
Tennish
When you are ill, because they are sick
It's a touchy subject.
Once when you tell it once when you tell her the punchline and once when she gets it.
Tell her a joke on Wednesday!