Seems common to use both (I've heard gender used by doctors many times when it should probably technically be sex). To me gender means "male or female" but sex

Seems common to use both (I've heard gender used by doctors many times when it should probably technically be sex). To me gender means "male or female" but sex means "male or female or f*cking." I assume lots of people think that way and that's why they prefer the word gender.