A very tired husband came home from the office after a long grueling
day to find his wife in her sexiest nightgown waiting for him at the door
with a couple of glasses of wine in hand.

She took his briefcase from him
and led him over to the couch where she proceeded to help make him "more
comfortable."

"How should we do it tonight, honey?" she cooed in his ear, "Shall we
do 69?"

"I don't think so dear. I'm pretty tired. How about 68?" he said.

"Huh, 68? What's 68?" she asked, a little puzzled.

"You do me, and I'll owe you one."