If you are interested in showing life of "others", showing vunerability, fear, rejections of society, whatever, you also can photograph life of disfigurated people for example, or people with alergies (of air, of sun, etc...) who can't live in normal circumstances. So, again, basic question as someone already asked is, why then you photograph nudes...

For me, it is combination of aestetics, beautifull forms AND 5 millions years of evolution.