Yeah I've had that and it's revolting. There's one client just now that I'm actively trying to avoid for this reason.
I've held back from complaining but seeing as we're on the subject...My client yesterday had a real stinky cock, sweaty balls, stinky shitty ass, sweat rash (or whatever it was!) between his thighs...It was horrific
I didn't mind giving a bit of a peck on the mouth but no way was I going near that cock and balls!!! Luckily he had come for a tie and tease so he was blindfolded and tied to the bed...It was that bad that everything I had used on him in the session got chucked in the bin, towel, vibrator I used on my gloved hands on his ass, whip, paddle..I was taking no chances.
Regarding women being as bad yes that's true, I've gone down on some in couples bookings and been horrified at the stale smell of sweaty pubes and ass holes, horrible smells coming from the vagina
This sounds a bit bitchy I know and a generalisation but I've found other escorts to be cleaner and body aware than a lot of non escorting ones.