"The artists don't view you sexually - they see the body as a series of lines and shadows, a piece of art" - Sarah Snee, Life model
Not 100% of the time though, one would imagine (especially as you have obviously never been near the ugly tree and your body doesn't remotely resemble a bag of spanners). And it is a two-way street too, otherwise, why this?
"I was intrigued by the idea of being naked in front of strangers," says Sarah. "Especially at the age of 20 when you're still getting to know your own body and developing your own sexuality. It was a very romantic idea, a bohemian idea."
If there wasn't a basic human interest in sex and nudity, why the need for nude life classes at all? Or if it's just about shadows and lines, why not a dustbin or a wine bottle?
Just admit it. The attraction of nudity as a subject is the nudity itself, driven by mankind's DNA-wired urge to reproduce, and made attractive to artists by modern society's suppression of base instincts.
No point trying to pretend the sexual appeal doesn't exist to assuage the Whitehouse types. Everyone's happy, just celebrate it.