A long time ago, I visited a place down in Greenwich Village (New York) called Village Fantasies.  It was next to the Blue Note, and it had a number of "actresses" who would help the hobbyist craft a fantasy to be explored.  The official word was that no bodily fluids would be exchanged to keep LE at bay, but nevertheless she offered a CBJ for the 1 hr. visit after she surmised that I was safe.

The woman was gorgeous (a Miss America Vanessa Williams look a like), and we came up with a fantasy where she was a college student at a very strict Catholic Girls College and I was the Principal.  

She had been caught playing with herself in the dark while viewing a slide show in an Art Appreciation class when she "got the itch" while watching some Greek Statues of David and the like.  Her teacher, a very stern nun, witnessed the display and sent her to me to correct her.  After several stern words, I told her that it was unfortunate, but that I would have to inform her parents of her public display.  She began to panic and begged me not to tell.  

A light bulb went off and her inner "bad girl" came out as she then tried to seduce me to convince me to keep it quiet.  My mood starts to soften (how ironic, considering how something else is starting to harden) and she senses victory.  But then I find my resolve and tell her that some corporal punishment is still in order.  I pull a chair out into the middle of room and sit on it.  I motion her over and she lays across my lap where she gets spanked 30 times for her "crime".  Afterwards, she has to stand in the corner with her skirt raised (half to help it cool and half to help the message sink in).

I tell her that she can sit down and she does, albeit gingerly.  She looks uncomfortable and I ask her what she is thinking and that I want her to be honest with me.  She tells me that she often gets the itch and is it so wrong.  I tell her that it is the public display which got her into trouble.  She sees the bulge in my pants and lays back in the chair and spreads her legs.  "So, if I do it behind closed doors, it's OK?"

"Yes", I say.  So then she watches me intently as she lifts her skirt and I don't stop her.  She starts rubbing herself through her panties and after a few minutes shudders and is still.

"I'm sorry I left you in such a state, sir" as she gets up and kneels before me.  She unzips my pants and gives me a BJ (after covering me up and saying "safety first").  After a few minutes I explode and she covers me back up, hugs me, and skips away out my office door.

OK, I'm a nice guy in the real world, but I've got this dark side that needs me to twirl my evil handlebar moustache every now and then. I would never take advantage of someone in the real world like this, but MAN it curled my toes when I did this.
The spanking was light, but was definitely hardwired into my brain as a kink after 12 years in Catholic School (3 of them when the Board of Education Paddle was still being used)

Any of you providers come across anyone who wanted you to exercise your imagination as well as other neglected parts of the body through fantasies or role play?