An old Jewish man and a young Jewish man are traveling on the train.
The young man asks: "Excuse me, what time is it?" The old man does not answer.
"Excuse me, sir, what time is it?" The old man keeps silence.
"Sir, I'm asking you what time is it. Why don't you answer?!"
The old man says: "Son, the next stop is the last on this route. I don't know you, so you must be a stranger.
If I answer you now, I'll have to invite you to my home. You're handsome, and I have a beautiful daughter.
You will both fall in love and you will want to get married. Tell me, why would I need a son-in-law who can't even afford a watch?"