Raising a nudist family?

I have been recently introduced to nudism and I LOVE IT and wished I had been introduced to it years back. I want to raise my 4 year old son and 2 year old daughter as nudists. I think its unbelievable, however there has been an issued raised. Will at a friends house with her 4 year old son, my son decided to take his clothes off and my friends son followed. She was shocked to see them naked together and I was embarassed. She was so concerned about his behavour she got onto the phone with her dad who is a psychiatrist to ask if my son was being molested etc. I also do not like the fact that he had done this, how dod I explain to him its ok to get naked sometimes but not others? Any suggestions? I believe nudity is great and it has taught me about a lot of things (I am 25)...I wish I would have been exposed to this years. I had always been self consious about my body (always thought everyone was perfect but me!) and its given me alot of self confidence, freedom. I want me children to not feel ashamed of their bodies etc. BUT I do not want him taking his clothes off everywhere...what to do