Back when I took my pay in sessions rather than cash for all the photography and web work I did for the boss of a big bordello, I'd role play with the girls in the room - telling them "I'm your ho and you're my pimp. Spank my ass and slap me in the face."

I did get clobbered occasionally - but mostly, the girls ran with it and both of us had fun. One girl was so into it she just slapped both sides of my face with both hands at the same time. She couldn't control her exuberance.

Empowering women during sex is a tried and true technique to many happy endings. For both parties.