I've never heard the term CMNF before and thanks for introducing me to an exciting new nomenclature! Having said that, I wanted to share an incident that happened when I was in college that could fit into this conversation:
I was acting in a college play and by the time I arrived backstage, all the changing rooms were occupied. The director looked at his watch then at me (and a few other late-comers like me) and asked us to go up to one of the college hostels and beg to use one of the rooms, just to save time. I went to one of the men's hostel nearest the auditorium. I had a few friends there - one of them gladly let me use his room and walked off.
I quickly laid out my costume and stripped naked because I had to wear leotards instead of trousers.
In my hurry I was fumbling with the garment.
Without warning, the door of the room suddenly burst open.
I straightened up and turned. Only to offer a full frontal to my friend's girlfriend who had entered the room.
(I must mention here that most of the rooms in this hostel did not have working latches. Secondly, women were not permitted beyond the reception area of the hostel - a restriction that was almost always ignored!)
We gaped at each other for the most horrific moments in my life, before she smiled at me slowly.
I could see her eyes shifting between my face and my nether region. Up and down, up and down they went, those soft brown eyes.
I stood frozen with embarrassment.
Then, putting her hands up, she slowly backed out of the room. I could hear her giggling as she ran down the corridor. The sound of her footsteps fading away.
I felt weak and dizzy for a while, not knowing how I would face my friend and this girl again.
Gaining my wits, I quickly got into my costume and rushed back to the auditorium.
When I entered the stage to do my part, I saw this girl sitting in the front row with my friend. I caught her eye. She blushed and I forgot my lines...