NSFW- (maybe) Who is really comfortable being nude?

I am browsing the interwebs tonight and I am watching these models being half naked for interviews and they seem incredibly confident being half naked for others.

I have been told I am a handsome man, but I am horrified by the idea of people taking pictures of me nearly nude for public consumption.

What kind of person is comfortable with this? Would most normal people be, or is it a special personality type?