The evidence sounds a bit inconclusive, all heated opinion aside. There was a glory hole WG in Edinburgh for a long time that gave a very good service at a very reasonable rate. Didn't get a single bad review on here. Theoretically it could have been a male or a female though my guess would be to put money on it being female.
Implant? Could that confirm the person as male or female at a quick look??
The more worrying part of the story is the unprotected sex, either fanny or arsehole. The two do tend to have a different feel to them.
Perhaps (only perhaps) the best indication might be the angle of penetration. An arsehole could be presented to a gloryhole fairly easily by bending over. A woman presenting her fanny would either have to bend over much further or be of a fairly exact height to do it facing forward.
It's all conjecture. The idea of unwanted and unprotected sex has made an interesting thread but still sounds like a very isolated if unfortunate experience. Otherwise it just comes down to preference and the idea that a brilliant blowjob afterwards is considered less than brilliant merely by imagining a man instead of imagining a woman (or a warm fleshlight for that matter).
Many years ago, I had a group of swinger friends, couples, who would hold private parties. One of the games was to blindfold each volunteer guy in turn as the rest of the company sucked his knob in turn. The blindfolded person had to rate the blowjobs and also guess if the person giving the blowjob was male or female.
I guess it wouldn't appeal to some people.