An old Jewish couple go to their Rabbi because they're having problems in the sack

"Rabbi, my wife hasn't had an orgasm in 10 years. Please, you've got to help us!"

The Rabbi informs them of an old spiritual remedy in situations like this. "While you are making love to your wife", the Rabbi says, "I will stand at the end of the bed naked, shaking a towel in the air over the both of you." The couple is very confused but reluctantly agree as the Rabbi further reassures it will help her achieve sexual bliss.

The couple go home with their Rabbi that same night and begin making love as he stands at the end of the bed shaking a towel in the air over them both. But nothing happens. No orgasm, no fireworks. The couple's frustration grows.

The man turns to the naked Rabbi angrily. "Rabbi! It's not working! What kind of mumbo jumbo advice are you giving me here?"

"Calm down, calm down", says the Rabbi. "Sometimes it works better if one stands at the side of the bed. This towel stuff is all about technique."

The frustrated couple get back to making love, this time the Rabbi begins shaking the towel from the side of the bed. Again, no orgasm. The wife is pissed, the husband is livid.

"For fuck's sake Rabbi, are you sure you're doing it right? Put your back into it or something!"

The Rabbi calmly replies "Maybe you would like to try it yourself then? We could switch" The husband springs out of bed and grabs the towel, accepting the challenge to upstage him. The Rabbi slides into bed with the wife, they make love and the wife has the most earth-shattering, mind-blowing orgasm she has ever experienced. All the while, the husband is at the side of the bed, shaking the towel like there's no tomorrow.

As his wife and the Rabbi lie in bed panting, the husband stands there triumphantly. "You see, old man!" he exclaims, "now THAT'S how you shake a fucking towel!"