A guy found himself unable to satisfy his wife.

He tried hundreds of methods but just wasn't able to do the job.
He finally went to his best friend and asked for advice. His
friend told him not to worry because he knew a method that was a
100% successful. He says, "Hire a big strong black man to stands
near your bed and waving a huge towel over both of you while you
are having sex. This way your wife will be stimulated and have an
orgasm."

The guy hired the strong man, but all efforts were in vain.

He went back to his friend and told him what happened. So his
friend suggested that they switch places. "Why don't you wave the
towel while the strong man does the job in bed," says the friend.

He agreed and said that he would do anything to satisfy his wife.
He hires the same guy again and this time they trade positions.
Naturally, the woman has a divine orgasm.

The husband leans over to the black guy and says, "You see!!
That's how you wave the towel!"