Typically asked when you and your girlfriend or wife are sitting in a public place and a beautiful/ attractive/good-looking/head-turning girl walks by.

Typical wrong answers are:

• yes, but not as beautiful as you, dear
• yes, but you are the only one for me
• no

In fact, the only right answer is to not appear to notice that the girl has walked by, continue looking deeply into your partner's eyes and say, with all sincerity, "What girl?"