What is the most intelligent one liner you have come across?

I was at a dance with some pals, we were all in our late teens and I spotted a really attractive blond, so I told my pals that I was going to ask her for a dance. They all laughed, she must have been in her early twenties and they said she wouldn’t even talk to me. So, I went over to where she was sitting and asked if she would like the next dance. She looked at me, looked at her friends and said (rudely) “Sorry, but I’m not going to dance with a baby.” I thought for a moment, and replied “I do apologize, I didn’t realize you were pregnant.”