...pelvis shape and the upper arm area.....
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That behind is what I was looking at in puzzlement — and curiosity not lust, as I am a woman — and trying to figure out how that could be male. The arm did not really get my attention, as one sees scrawny arms on guys rather frequently, but, now that you mention it, I can see the big difference up at the shoulder. Glad you cleared that up.
.Trust me, many guys(and women) are fooled.
One video she is wearing a bikini bottom, looks real as in a woman and then untucks the male equipment....kinda difficult to fake that...
Look at the Canadian Miss Universe she/he...Most people would think that was a women until they knew otherwise.