Naktiv sitetakes a sensible approach to photo guidelines. Many sites both on the internet and in reality require men to sit with legs together, and avoid spread eagle positions, etc. I know for myself sitting with legs together in most cases is so uncomfortable and unnatural. Nudism is about being nude and natural, so if we start sitting hiding parts of ourselves by positioning ourselves in unnatural ways to avoid certain angles of view, then we might as well be wearing clothing.
Having said all that. there are some who because they get some sexual thrill from showing themselves off in public take things to an extreme and cause a natural position to become sexualised. It is these people who ruin something pure and make it distasteful.