Sex-sexual-gender discrimination

Hello everyone: Could you tell me if there’s any difference between “sex, sexual and gender discrimination”? Can the three terms be used interchangeably? Thanks…

I understand all three to mean the same, but I prefer “sex discrimination”, which is the standard term as far as I am aware.

When the male/female distinction is meant, “gender” now often seems to be used as a kind of euphemism for “sex”, unnecessarily in my view.

Thank you! (I’ll use “sex discrimination,” then.)