Once I was talking with my girlfriend (and you guys know how painful that can be). She said - "I'm going to go look at cars tomorrow." Being a guy, I replied "Hey, why don't I come along so a man can help you?"
She got very offended. "That is so sexist. Just because I am a woman doesn't mean I am ignorant about cars. I understand the differences in the service requirements, reliability, gas mileage, resale value ... "on and on and on (you know how she is).
I responded "I'm sorry baby, I didn't mean to upset you. It was sexist and I realize it. Please forgive me. What kind of car are you thinking about buying?"
She responded confidently "A red one".