Gosh. We actually had a conversation about gender at home last night, in front of four teenagers (not all mine), without anyone humphing out of the room because Your Generation Just Don't Understand.
DH (IT) was grumbling about trying to sort out the balls-up someone had made of an appointments system which now asks the client to put in both their sex and their gender. Apparently almost nobody just fills it in as M, M or F, F. Some people only fill in one box (and if that's the gender one, it could mean 'I think this is the polite word' or 'I, like, totally believe my gender is more pertinent to my records than my sex'), some write unhelpful screeds in the gender box. And then the software has a hissy fit and falls over.
I mentioned that for my work, the current rule is 'If it's biological, use sex; if psychology, consider using gender, but check with author.'
We had a mild discussion about the importance of collecting sex-based data for medicine, and a brief foray into the original meaning of the term 'hysteria' and the question of whether to allow 'gender' in a study of Guatemalan multiple murderers (genuine topic, we decided that despite this being a psychological study, their declared gender identity was probably not what was meant). None of the teenagers slammed out of the room. Progress?