A Jewish man is distraught because his son has converted to Christianity, so he goes to see his rabbi to ask where he went wrong.

The rabbi says "Funny you should come to me with that, because just last week my son converted to Christianity too."

"That's terrible, says the man. So what did you do?"

"Same as I always do in times of trouble, says the rabbi, I prayed to God."

"And what did He say?"

"He said 'Funny you should come to me with that...'"