And not just in Russia! Although not a nudist or naturist on land, I'm a fiend for skinny dipping. This summer I indulged in it many times on my long, sweaty bike trip to and from work (this Siberian winter was preceded by a truly tropical summer!), in the Fjord of Hafrsfjord, where King Harald the Fairhaired defeated the petty kings and united all Norway into one kingdom in 872.
I reckon I shocked a few tourist busses with puritan cruise tourists going by on the road to visit the Millennium Monument to the Battle in Hafrsfjord. :-)
To be fair one of my best swims ever was in swimming shorts, in the Lake Alpsee underneath the windows of Mad Ludwig II of Bavaria's Neuschwanstein.