For me, it's more sweat the better. I had only one escort really fulfill my request of an actual sweaty session (and not just metaphorical).
I met him at his house in Los Angeles summer (July or August). He set up a mattress outside in his very private backyard (no neighbors). We had a literal hot hour and both of us dripping in sweat. Haven't had anything like that since. Even turning up the heat in a hotel room doesn't really produce that much sweat.