My friend is a photographer, yes he sometimes take nude photos. For him its art. He is a professional,  so no piap session afterwards.  But he said, sometimes the models themselves offer my friend to take nude photos of them no need pay extra. Its for the models private collection/portfolio.

But those nude photos are not like u see in prawn sites or prawn megs, its more of art. Part of body, the curves of the body and so on. No erotic posing. He sometimes show me his collection. It is quite nice.