There is no guess what gender it is as that looks 100% real women. She has a nice face, nice tits, and a nice body. Now she is covering her private parts with her knee, so perhaps somebody thinks that's a sign it might be a women. But with a little tape, and tuck you wouldn't be able to tell anyway.
I think the main thing about the ad is it didn't address the sex category the ad was for:
w4m m4m m4w w4w t4m m4t