An American approaches a British gentleman at a club, asks if he’d like to play tennis.

The Brit replies: “No thank you, tried it once, didn’t like it.”

The American asks if he’d like to play billiards.

“No thank you, tried it once, didn’t like it.”

Would he like to play bridge?

“No thank you, tried it once, didn’t like it; but I see my son approaching. He might like to play.”

“Your only son I presume”.