A couple visiting France on NND falls into the Bastille Day tradition of nudity all day. Friends guide them including sex there, on 2 trains, with more friends in Cannes.
As a young male growing up on a farm in Colorado, interaction with members of the opposite sex were limited. Luckily, I had a few cousins to keep me company.
An older man in a sexless marriage finds lust handily nearby and his life is enriched. That gets his asexual wife going again and they have more adventures than in their younger days.