also think that during the 70's there was a big boom of new ideas when it comes to bodyfreedom and other similar topics
I fully agree with you Darude that during the 60's and 70's there was a huge growth in social nudity amongst young people, and that would account for the significant proportion of over 50's naturists. In my personal opinion there are probably just as many young people who practice naturism, but who choose to do it in the privacy of their own homes. The reason for this may be a reduced acceptibility for public nudity in the general consensus and also a lack of knowledge of what the naturist movement entails. In my personal opinion the naturist movement is very insular and as a result the majority of young people involved in it have been brought up in a naturist movement or know someone who is a naturist. Regarding membership of clubs it is understandable why clubs have an inherent suspicion of single males, but i do not believe it is sensible to lump 18 year olds in the same category as a middle aged man, as from my personal expereince the majority of young adults are either single or not in a serious long term relationship, so it unreasonable to be overtly suspicious of young men just on the basis of being single. Regarding women it is intersting to note from this forum that many clubs do not have a fair balance of young adult males and females. From my experince at the Brighton WNBR, which does not suffer from threating voyeristic phtographers as the London WNBR does, the proportion of male and female participants are about the same, and to me this shows that both women and males are equally willing to embrace social nudity. Therefore my belief is that the main reason why there are so few young adult social naturists it it's lack of widespread acceptibility and appeal, as events such as the WNBR, and the Spencer Tunick installation at the Big Chill festival shows that in an environment where young adults are comfortable to be nude, there are a large number of willing participants.