That's what sex means in a medical context, though: your equipment. Your doctor is on the short list of people who have a need to care about that, because it's one of the rare places where anatomy matters.
I'm fairly far right on a lot of matters (and just spent a few ammo boxes hunting the elusive wild skeet this weekend). I'm socially liberal in the classic sense, though, in that I don't care what people do if it doesn't affect me. Want to smoke pot? Marry your gay partner? Go by a gender different from your biological sex (or even something totally different)? I couldn't care less. That's between you and your loved ones.