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Flo we cannot *see* someone's gender identity! And yes we don't want to see their genitals! But in both cases we can ask (and be clear why & what we are asking). Do you not think that sometimes it is relevant to know someone's sex?
(also it is usually obvious what sex an adult is, without asking, or examining their genitals. We can't help noticing - - it is impossible to know what gender someone identifies as without asking them)
