Till Completion

So there I am, sitting on the paper draped exam table, fully clothed, listening to my doctor explain some medical procedure I know nothing about. Not even sure why she is telling me this information. She can best be described as just over pettite sized, but barely. Almost as if she could shop for clothes in either section of a clothing store and still get away with it.  She is a bit feisty, young, and beautiful with flat straight long hair down past her shoulders. She stops her explanation and tells me she has only about ten minutes before her next patient and we would need to hurry this next part of my examining. She instructs me to remove my clothing from the waist down. She turns her back as she opens a new box of examination gloves and puts on a pair. She turns back around as I sit on the table. She asks me to lay back against the angled section of the table, this exposes me more to her gaze. She asks if I would be able to get an erection for this part of the examination. I try to inquire about her request but she cuts me off telling me she wants to see for herself my ability to comply, through till orgasm. Wow! What did I just hear? She grabs my penis and inspects it along the shaft, the meatus, and my testicles. She releases, looks up at me and asks again for me to get erect for her examination. I start to consider grabbing myself and start stroking a bit, but I'm concerned she would not appreciate the action.  She instead grabs me at the base of my penis again. Her thumb on the top, two fingers underneath. These two fingers she expertly rolls up the underside of my penis, almost folding it over her stationary thumb. She does this about five times, then releases and motions me to continue it myself.  She spins around on her rolling stool and tells me there is only about 8 minutes remaining and we need to hurry up if I want her to help me with my medical care. I still have no clue what is going on here. She spins back towards me and sees I'm not erect, and not holding myself. She tells me that she needs to watch me masturbate to completion to determine what course of action we need to take to treat me. She again says less than 8 minutes remain. She also throws in there she is not sure if I usually can compete my orgasm in less than ten minutes, as it sometimes takes her longer.  I now think she wants to watch me masturbate and orgasm for her, but I'm still not sure why. I start stroking my penis and two strokes later my alarm clock goes off and I have to wake up.