Dancing with the wife

A couple preparing for a religious conversion to Judaism meets with the Orthodox rabbi for their final session. The rabbi asks if they have any final questions.

The man asks, "Is it true that men and women don't dance together?"

"Yes," says the rabbi, "For modesty reasons, men and women dance separately."

"So I can't dance with my own wife?"

"No, definitely not."

"Well, okay," says the man, "but what about sex?"

"Fine," says the rabbi. "A mitzvah within the marriage!"

"What about different positions?"

"No problem in general" says the rabbi.

"Woman on top?"

"Why not?" replies the rabbi.

"How about from behind?"

"Of course!"

"Well, what about standing up?"

"No!" says the rabbi.

"Why not?" asks the man.

"Could lead to dancing!"