Whatever someone wants to do with their body is up to them (within legal limits)

To the people who say "she's selling her body", I say this:

So are you. So am I. So is everybody. A miner or oil rigger is selling their body to be used as labour for 10 hours a day.

An accountant is selling their body to sit at a desk and crunch numbers for ten hours a day.

We're all selling our bodies to corporations every day in exchange for a paycheque. If a person is comfortable using nudity for it, more power to 'em.