It's an uneventful everyday occurrence for an artists' model in a figure drawing class. Modeling seems an ideal occupation for nudists, and quite a few nudists have modeled at least informally, if not as a steady profession. While a modest person, uncomfortable with being nude in public, would have to forego modeling, the nudity only gets you on the stand. From there, depending on the amount of professionalism you bring to the art, it becomes work. Modeling requires patience and stamina to remain motionless for 20 to 30 minutes, and endurance to repeat the same pose after a five minute break.
Some classes use the same pose for three or more hours.
In a standard life drawing class, there are warm up exercises, or gesture drawings that require a frequent pose change, from every five minutes to as often as 30 or 15 seconds. Being male, I tend to show action and tension in my short poses, which can be quite a workout in 10 or 15 minutes. I've seen some female models expend as much energy in their less aggressive stop-action ballet. Indeed, having always been too self-conscious to dance, my modeling has given me a certain sense of grace as I assume various traditional art poses. Having an interest in art makes modeling more enjoyable and rewarding.