What is the protocol for painting from nude models?

Question:

What is the protocol for painting from nude models?

I am signed up for a figure-painting class and am wondering how to be polite in that situation...please, serious answers only!!

Best Answer - Chosen by Asker: Having participated in and taught life model (dressed, semi-nude, and nude) figure study classes, I'll state the obvious: The model is doing a job, and you should do your job ... drawing/painting. Looking but don't gawk/stare. Concentrate on line, shape and form. Speaking to the model before/after a pose ONLY IF the model speaks to you first. Lastly, relax & enjoy!