Is it normal to help a friend become a nudist?

One of my closest friends recently revealed to me that s/he is a closet nudist. S/he wants to be able to go nude in public but wants to try being nude in front of a friend first. S/he is adamant that there is no sexual motive and will not try to persuade me to become a nudist. I am unsure how to respond to this, because whilst I am willing to help her/him, I don't know what exactly to do. When this first happens I feel I am going to want to stare at the sexual parts. Should I avoid looking or should I have a good look? If I look, should it just be a general look or should I look closely. Should we just sit around or should we try doing something? I am worried that sitting around will result in me staring. Then there is the question of physical contact (again let me repeat that my friend wants this to be non-sexual). We are used to hugging when we meet and there is a lot of non-sexual contact like leaning on shoulders. Should we carry on or does it become awkward. The gender is disguised because I want as neutral a set of answers as possible.