This photo is from 1916 and features Alice Maison in fur fox tails at the beach. Alice was an early pin-up girl, before they were called pin-up girls. Swimsuits were not revealing enough to be worn by pin-up girls. So it was fur at the beach for cheesecake shots for publicity purposes.
This is a shot of Marian Carr in 1948. She's wearing a rabbit fur two piece swimsuit. I just can't imagine that that would hold up very well. Movie publicity men we're trying to come up with new angles for promotion and since pretty girls are plenty, fur swimwear was a viable option.
Beauty at the beach I understand but fur at the beach? It doesn't work for me, it's just too odd of a juxtaposition.