I usually go to work by bus and usually don't care if people enter before I do (unless I'm on a rush), so I just step aside and let people pass. Sometimes there's a lot of people, sometimes just 1 or 2. Last week was just me and another woman waiting for the bus. As the bus stopped, I let her pass in front and she gave me a sort of a scornful look and groan before finally passing.
Later that day I've been told some women don't like it when men let them pass or open the door for them or something (because they consider it sexism coming from a man), so I thought maybe that was the case. I've honestly never looked too much into it until that day, and remembered I've always been raised to always act like a gentleman.
Can these traits I've attained be considered sexist, even though in my mind, I really don't care if I'm lending my spot to a man or a woman (as I've been doing most of my time)?
For reference, I'm currently living in the north of Portugal.