Mandatory Physicals
My fantasy as a play doctor usually revolves around mandatory physicals. Those are the situations when the patient doesn't have an option but to submit to the exam of face serious consequences. Examples include military draft, prison intake, visa applications, pre-employment physicals.
In those situations the patients are as healthy as they can be, but must undergo a full physical because of an institutional rule. They know they have to comply and will usually follow all instructions.
In my fantasy I have an entire day ahead of me with a huge group of men waiting for their physical. They may come individually or be examined as a group.
In this fantasy, I don't play a "modern" doctor that is polite, introduces himself and explains each procedure. No, I'm the one in power and I just bark orders that I expect to be followed with no questions asked.
When the patient comes in, I ask them for the form and tell them to undress right away. "Take your clothes off". I don't specify the level of nudity and let them puzzle about what my order means. Most of them will keep the underwear on, hoping that's what I meant. Depending on my mood I may shout a rude "everything!" or let them be for a while.
I'll take full advantage of the situation and make sure they are as humiliated and embarrassed as possible. They have no choice but to follow orders. Then they're fully naked, I'll tell them to stand with arms behind their head while I observe for a long time.
The genital exam will be long and detailed and I'll try to cause an erection to further humiliate the patient. Most don't expect a rectal, but they'll all get one. Some may resist and I'll remind them it's part of the physical and they have the option (except in prison) to not complete the exam and lose the job or visa or whatever it is they applied for.
As the day goes on, with a waiting room still full of patients, I start to take them in groups of five to save time. I have them strip naked and line against the wall. Then I contemplate the power to have 5 grown men get naked because I told them to and stand before me waiting for my next orders.
I'll ask each one to step to the center to be examined. Depending on the group I may let them watch the whole thing or tell them to face the wall.
It will be an experience they'll never forget and still may be too embarrassed to share with anyone else. They may just say it was "normal," but they feel violated and angry.