A friend of mine got asked if she had a boyfriend. She asked back "why that question". It was to know whether she would be likely to get pregnant and miss work.
I'm curious, are you in the USA? Working in Western Europe, so far I have never seen sexism (nor racism) happen at work. Outside of it, for sure though.
Are you a guy by any chance. I also hadn't noticed until the day I asked a couple of my women colleagues. Turns out it can be very subtle but "effective". And it can also come from women.
As a guy, my manager kicks ass and we’re all extra motivated to make her look good. She used to be a peer but once she became manager, her true skills shone