I agree, Whippett.
Though I've never taken a drawing class, I work in the arts and perhaps that's why posing naked has never seemed sexual to me. I also have lots of friends that have done it, therefore it's not a foreign concept. I can understand the sensuality of it, more so for the model. To have all eyes cast upon drawing the most detailed curves of my body sure does seem sensual.
It only seems pornographic to people in the US because nudity is a forbidden.
Congrats Amber, glad to hear it went so well!