A man was in a bar. Hoping to strike up a conversation with a distinguished looking fellow sitting nearby, he said,
"May I buy you a drink?"
"No," said the man coolly, "Don't drink. Tried it once and I didn't like it."
"Would you like a cigar?"
"No. Don't smoke. Tried tobacco once and I didn't like it."
"Would you like to join me in a game of gin rummy?"
"No. Don't like cards games. Tried it once, and I didn't like it.
However, my son will be dropping in after a bit. Perhaps he will join you."
The first man settled back in his chair and said, "Your only son, I presume?"