At the age of 21 I was asked by a couple of 11 & 12yr old boys to teach them how to play squash. This puzzled me as they were not the squash playing type, and when I explained that we would need to shower together afterwards, they both exclaimed "I know" and I knew at that point I could not oblige them. 10 years later I was showering after a game of squash with a colleague when his two 11 & 12yr old sons came into the shower and romped with me, and to my astonishment I was not embarrassed by an erection, so I would agree that naturism could be beneficial.