A normal hospital room

Nurse Coleman leads you through some winding hallways to another normal-looking hospital room. "Alright, Mr. Doe-" "Please," you interrupt. "Call me John." Being so formal with someone who slapped you on the ass seems weird.
The nurse agrees to it. "Alright, John," she says, looking you over. "Please lie down on this bed over here." You do so, not enjoying the feel of the hospital fabric on your bare back & ass. She glues some electrodes to your temples and turns on a nearby machine. The hum of a computer fan fills the air.
"Alright, Mr.- I mean, John," she says. "Time to measure your reactions." She then slowly starts stroking your cock, eyes on a screen in a corner of the room that you can just barely see. You moan, tilting your head back. She nods a bit, then speeds up with the stroking, going faster and faster until you're about to cum and then-
She stops, eyes still glued to the screen. Finally, she looks down at you for a second, smiles a bit, and finishes jerking you off. You moan as you climax.
After the messy act itself, she gets a towel out of a nearby desk drawer and wipes you off.
"W-what was that all about?" you ask, a bit embarrassed.
"To see your reactions, of course. To see if you can engage in public sex or not," Nurse Coleman replies.
"Oh. How'd I do?"