A married man heard a rumor one day as he was out drinking with the boys. A new guy had moved in in his apartment block as his neighbor. The rumor had it that the guy had had sex with every woman in the block, married or unmarried except one.
Very disturbed, the guy went home and after alot of pondering, he was convinced that the one woman who had not had sex with that man was his wife. However to confirm the truth, he decided to share the rumor with the wife.
"So you hear," he said as he ended, "That guy is said to be smooth. So smooth that he has slept with every woman in this apartment block except one woman. Would you believe that?"
Shocked, the wife replies, "All except one? Well that must be Mama Steve from second floor. "