...me and masturbate while watching me masturbate.  I think she actually preferred this to intercourse.

Some do

I remember the first time I showed off to a female friend. I felt like an idiot,  stopped to ask If she was truly  enjoying this she snapped at me NOBODY SAID STOP then she started masturbating to my masturbating.

I like it...

I love to put on a masturbation show with the help of a toy or two.
Something about a gent watching me really gets me going and even better if he decides to help out
A gent masturbating in some instances does turn me on especially if we are both going at it at the same time.
Just my .0

Punching the Clown? Don't you mean

Spanking the Monkey?  or Choking the Chicken? What do the wimmin call it?

'Just beat it!'

Very Hot..

I am so visual and the fact that I can get you comfortable enough to let me watch.. Oh Yeah...  

There is a mirror in my bedroom for a reason.. I am watching at every angle, every chance I get.

Oh YES, huge turn on for me when a client also plays with his cock

DEF a turn on for me to watch him stroke his cock too! I like when we take turns...

i love watching a guy masterbate in front of me. major turn on.

I know a few providers who are extremely expert at this, and sometimes decided to get off that way.

The hand is an extremely nimble and tight sex organ when used correctly.

Also, do gals ever find that guys are adept at fingering them?  I had one gal who loved it when I did so, but normally there aren't too many takers for that.

Omg I truly find it one of the hottest, most erotic things out there. It makes me very hot and wet to watch a man pleasure himself. Yummmmmmm......