'For an artist working in the room with the nude model, an unexpected erection is a minor inconvenience. When drawing from life you start with the big stuff and always leave "the details" for last.'
Most models who take jobs modeling nude for art classes report that they get over the 'being naked' part pretty quickly. Of course there are nerves, especially the first time, but once they drop their robe, it becomes about staying focused and maintaining the pose. What if however... the students didn't draw you, didn't just look, but also touched....
What if your students were older, what if they were visually impaired, even blind. Would you be able to stay focused if the first half of the class was about memorising your body into their minds through feeling every inch of it. Feeling for size, muscle mass, texture and girth. Then, as they sketch away, the instructor reminds them of your dimensions by describing your body, and your body parts to students as they work on their creations.
