I'm glad you don't think I'm sexist for holding the door. (I do it for everyone because it is supposed to be polite.) I and my very few friends have all had instances though, where this was interpreted as sexist. Thus, having never held a door just because someone was a women, I was a little confused.

It is sad that your exs seemed to lack a basic level of human decency.

I also want to mention that I hate women who will attempt to use the image of the "helpless maiden" to get someone to do work they don't want to do. (I guess the same could be said about sex, but I already mentioned that.)