Like most generally polite people I say thank you when I see people going out of their way to hold a door open for me, unless I'm really distracted. But today, I walked into a busy shopping centre straight after a man and briefly took over hold of the door that he'd pushed open, before the person behind took it over from me. The man in front hadn't needed to pause in any way, but he immediately called over his shoulder "Thankyou!" in a sarcastic voice. I instinctively said "Thankyou" back to him in a similar tone, followed by:
Him (sarcastic): "Nice to get some politeness from a lady!"
Me (ruffled and unimaginative): "Sexist pig!"
Him: "Lesbian!"
I left it there, but it upset me enough to cut short my shopping trip and come on here for a moan to get it out of my system.
Sometimes people don't say thank you to me too - it happens to all of us - but surely only a complete prat behaves like this?
At least his friend had the good grace to look embarrassed.