I thought a whole bunch of people said "You can watch me if you pay for the session" and an escort or two said "Sure, so long as you pay too."
My guess would be that its not the SP who will be reluctant so much as the client... yet a bunch of dudes volunteered.
That's how I recall it. If I weren't too lazy to use the search function and re-read an old thread I'd doublecheck. But, I can't be bothered.