Laura fell for her handsome new dentist like a ton of bricks and pretty soon had lured him into a series of passionate encounters in the dental clinic after hours.

But one day he said sadly, "Laura, honey, we have to stop seeing each other. Your husband's bound to get suspicious."

"No way, sweetie, he's dumb as a post," she assured him. "Besides, we've been screwing for six months now and he doesn't suspect a thing."

"True," agreed the dentist, "but you're down to one tooth!"