A man is sitting on a train, reading a newspaper, as it pulls into the station. A woman boards the train, and the two notice each other briefly. She takes her seat a few rows in front of him.
The train departs, and after a few minutes, the woman gets up from her seat and approaches the man.
“Excuse me. Are you Jewish?” she asks.
“Uh, no. I’m not Jewish.” He answers, slightly miffed by the strange question.
Apparently satisfied with his answer, she returns to her seat.
About ten minutes later, she returns.
“I’m sorry, but are you sure you’re not Jewish?” she asks, peering over his newspaper.
Still confused, he answers over his folded newspaper, “Uh, yeah. I’m pretty sure I’m not Jewish.”
She gives a suspecting glare, but returns to her seat.
Thirty minutes go by before she returns, yet again.
“I’m sorry, but are you absolutely sure you’re not Jewish?” she demands.
“Fine. You win. I’m Jewish.” he snaps, visibly annoyed.
“That’s funny,” she says. “You don’t look Jewish.”