If you look at the anus in isolation (completely zoomed in, excluding the surrounding genitals), it is almost impossible to tell the difference between a man and a woman.
Can';t imagine this one even being a point of debate or discussion - sex workers are just people like anyone else. They're in an unusual line of work, but not one that is more or less immoral than, say, a business man.
This kind of place is most definitely not representative, and is probably one of the worst places to derive a sense of this kind of thing. It's not for nothing that the guys who are here are here.
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