No, because I'm still hoping to run for President of the United States one day, or maybe return to teaching (that second part is true).
Seriously, doing nude photo work is a decision you can't reverse in today's world, that may come back to haunt you later. Once you cross that line there's no coming back.
But, if you think this may constitute your sole 15 minutes of fame, with nothing more of notoriety and public scrutiny ahead of you in your life, then have fun doing it. The shame issue wouldn't enter in to it for me (well, yeah, my body right now would shame me, for different reasons), as I'm not the least bit shy, formerly a member of a gay nudist club, still frequent a nude beach here.
Just make sure this guy is legit, without a private agenda (unless he's really hot and it suits your own purposes). Read the model release/contract carefully, and get a clear understanding of the who, what, where, when, especially the location, theme, and others who may be present behind or in front of the camera lens with you.