Ha! Just go to the BDSM section and get a face-sitter. They WANT you to be a starfish and keep your hands and dick to yourself.
The job is supposed to be fun, otherwise, why do it? I got one provider that lamented the fact that the majority of clients it was just like a job, an exercise in mechanics, a transaction that wasn't worth remembering, but the money was good. Then there is the "bad" clients that give inappropriate feedback or they do something else disagreeable that is never forgotten.