aquanude
a person that is not a nudist except when swimming, at the beach or in a hottub.
John is a true nudist, where his aquanude wife only gets nude in public when swimming.
aquanudity
aquanudity-(awk-wah-NEW-ditty) Vt-Any act or experience that simultaneously involves water and a distinct lack of clothing. Ex. "My shower was such a wonderful session of aquanudity!"
Tom's enjoyment of aquanudity has almost risen to the level of fetish.