Do you like cabbage?

Seamus was about to go on his first date, so he asked his brother, the ladies man, for advice. "Give me some tips on how to talk to them."

"Here's the secret," said his brother, "Irish girls like to talk about three things: food, family, and philosophy. If you ask a girl what she likes to eat, it shows your intentions are honorable. If you discuss philosophy, it shows you respect her intelligence."

"Gee, thanks," said Seamus. "Food, family, philosophy. I can handle that."

That night as he met the young lady, Seamus blurted out,

"Do you like cabbage?"

"Uh, no," said the puzzled girl.

"Do you have a brother?" asked Seamus.

"No"

"Well, if you had a brother, would he like cabbage?"