David Beckham's Nude Photos

So I was asking myself, "Why would they (famous people/ celebrities) want to pose nude on magazines and internet?"

If they are doing it for popularity sake, then it's so so wrong. If they are doing for charity, then this isn't worth donating for.

There are the nude photos that are artistically taken.

Okay, not that shabbily taken.

And those that are not.

So why are they doing this?