Went to wash car with DH in supermarket car wash this morning and a woman was inflating her tyres nearby. She came over to us in a flap and said "excuse me does your husband know how to inflate car tyres I've done it wrong?". This annoyed me the assumption that a man must know about cars and not me. I was smug pleased to be able to say "I can help you with that" and showed her what to do. AIBU to be irritated by this?