The whole thing seems pretty ridiculous in general
I mean, from what I've heard (yes, I know folks who have done it), they're basically just prostitutes- relatively cheap prostitutes, but prostitutes nonetheless. Maybe there was a time where it was just a normal massage with the option of a HJ/"happy ending" for a decent tip but pretty sure those days are gone and folks who frequent these parlors spend far more time just ####ing than they do getting rubbed down.
I've also never done the more "traditional" prostitute thing and never really had the desire to but always figured that if I did, I'd have to do something special, like 2 ladies at once or something like that. I mean, as long as you're paying for it, why settle for ordinary sex?