Is it normal for a 50 year old male to want to model nude for an art class?

Depends on why you're doing it. If you're genuinely doing it for art, go for it.

If you are in good shape, go for it.

Get your rocks off doing that. Huh pop?

Well you probably have exhibitionist tendancies. This would be a legal way to fullfill that desire. Not saying that there is anything immoral about having that desire but society frowns on it unless you are in the appropriate location.

You could also go to a clothing optional location like a resort or a clothing optional beach, assuming you don't want to have to register as a sex offender.

Watch you don't spring a woody because there is one drop dead gorgeous babe with big tits and a short skirt there.

Yes it is normal. Many models are over 40, female are well as male. But I do hope you are in reasonable shape and not a slob.

Go for it. Artists need to learn how to draw all different types of bodies, so you don't need to be in shape to do it. It you have exhibitionist tendencies then this is a perfectly legal way to expose yourself.

if that's what makes you happy and if they agree..

Uh go for it if they want you.

That's one way to be an exhibitionist without winding up in jail.

*remembers a disturbing bit with Will Ferrell on SNL*

Art isn't limited to society's definition of appealing.

Do you boo boo

And how do you get off?