Medical Kink
The audio includes reference to medical play as a kink, and as a form of contextualised erotic roleplay in any scenes; (see Medical Play).
Let's see how all these look on you! :)
Returning home from stocking up with a box of medical gloves, I test a theory I had about your medical kink. And... it looks like I was right. I'm going to treat your swelling inside and out, draining every drop.