Sexist bf

My bf just something so sexist, I almost cussed him out. I want to calm down and explain to him why what he said was wrong but a) that’s not my job b) I will probably say something mean that will only escalate the situation and c) ITS NOT MY FUCKING JOB. I know I should just calm down but I’m really pissed that he thought that was ok. He then had the audacity to sit there as if he was confused on why I was upset. He knows how I feel about double standards and the treatment if women, but he wasn’t to proceed talking like everything was ok.