I'm sorry you have to deal with ignorant people. I know it's awful for people to be this way, and sometimes they are quite annoying, but really for the most part, I think people don't mean to offend.
We live in a world where it is not politically correct to assume anything and it seems like no matter what is said, someone is going to be offended.

Unfortunately for the most part,, it's still a man's world and when we work in an area that is predominately men, then people are going to be surprised or make unwanted assumptions or remarks.

I always try to ignore the remarks, and consider the source.