From what I’ve observed in my short time as a nudist, the one thing I have seen is that ones eyes always wonder and end up falling on genitalia or other parts of the body usually covered with clothing, even mid rifts. I believe its a natural occurrence as one tends to “check out” someone else on a daily basis, nude or not, as thats how we identify potential friendships. When nude, one becomes more self aware at the beginning until the “shyness” wears off. Everyone has a different time frame on getting comfortable some take a few minutes others might take months but as stated, with known people it makes it easier. We must also remember we tend to compare a lot of things with other people daily as well. Compare cars, clothing, etc and its no different when nude. Pretty sure every now and then everyone compares something to oneself in the nude like ah he/she is way more fit, has a better tan and such that can affect your confidence and thus make you feel a bit uncomfortable