An elderly Jewish gentleman marries a much younger woman. No matter
what the husband does sexually, his wife never achieves orgasm.

Since a Jewish wife is entitled to sexual pleasure, they decide to ask
therabbi. The rabbi listens to their story, strokes his beard, and makes
the following suggestion:
“Hire a strapping young man. While the two of you are making love
have the young man wave a towel over you. That will help the wife fantasize
and should bring on the desired event.”

They go home and follow the rabbi’s advice. They hire a handsome young
man and he waves a towel over them as they make love. It doesn’t help and
she is still unsatisfied.

Perplexed, they go back to the rabbi. “Okay”, he says to the husband,
“let’s try it reversed. Have the young man make love to your wife and
you wave the towel over them.”

Once again, they follow the rabbi’s advice. The young man gets into
bed with the wife and the husband waves the towel. The young man gets
going with great enthusiasm and the wife soon has an enormous,
room-shaking, ear-splitting, screaming orgasm.
The husband smiles, looks at the young man and says to him
triumphantly, “You see, you young schmuck? THAT’S how you wave a towel !!! “