If you are comfortable with it, and want to do it, I say go for it. I went to an Arts high school (yes, I am one of those), and the visual artists would have nude models from time to time. For several months an eight-foot-tall painting of a old naked man with a pierced penis graced the front lobby of my school. We were "progressive".... or something.

If my Master wanted to do it himself, I wouldn't have a problem with it.

If I wanted to do it, I think his biggest issue is that so far I have refused to pose for him (he is a fairly serious amature photographer) and wanted to go pose for strangers.

That being said, I don't think it is something I would actually do. Stripping down in a room full of strangers is just not on my list of fun things to do.