A woman on a train walked up to a man across the table. "Excuse me," she said, "but are you Jewish?" "No," replied the man. A few minutes later the woman returned. "Excuse me," she said again, "are you sure you're not Jewish?" "I'm sure," said the man. But the woman was not convinced, and a few minutes later she approached him a third time. "Are you absolutely sure you're not Jewish?" she asked? "All right, all right," the man said. "You win. I'm Jewish."
"That's funny," said the woman.
" You don't look Jewish."