My ex-girlfriend used to work for an art department as their nude model. I never had a problem with it. She was there to earn money for school and it paid the bills. None of the people painting/drawing what they saw were getting off on what they saw. Plus, she came home to me so why should I have a problem with it?
As an additional plus, while she had the job she actually bothered to shave her legs every day (which didn't happen normally). Hurray!