Just putting yourself in her shoes for a minute I think it is accurate to say a turn off is a smelly guy who hasn't shaved.  In order for the encounter to have a maximum chance of success "brush your teeth, wash your ass" seems like the bare minimum a lady would request.  I'm not sure that qualifies as an actual turn on, but avoiding turn offs will certainly help things along...IMHO.

What we want

You'd be amazed at how many guys show up unclean, unbrushed, and smelly/dirty down there!

Some have left skidmarks on sheets, poo on washclothes, on the floor, in bathtubs, etc.

Nevermind the smegma/ dragon breath/ what is that? issues.

That's why those turn-ons and turn-offs exist.

A guy can be rough/rugged and still be clean.  Turning up unclean just shows a lack of respect for the provider and a lack of self-respect.

Is a stinky, dirty, unshaved guy expecting the same from his provider?  

Really, it's just good common sense if you really want to have a good time.

Swim

I too noticed for years that I kept getting passed by on the civie dating circuit for the rough and crude types.  They seemed to have a certain animal magnetism that I lacked, even though I surpassed them in the manners and civility departments.

A few women with whom I became close Platonic friends with admitted as much.

However, in the escort world, just the opposite rules apply.

Perhaps this is the crux of the difference between the civie world and the escort world.  In any case, I do now know which world I like better and in fact, have decided to date an escort and I'm loving every minute of it.