[Torchwatch]

Next time you go to the mixed costumes compulsory sauna suite wear something slightly briefer than last time.
If you are comfortable and no one complains, then keep it up for a while.
One day go shopping and buy something slightly briefer, tighter and more colourful than the current suit, wear it to your sauna and see how you and the others react.
Wear this suit until you start thinking of something even more exciting, while you are at it watch the other sauna users and see if anyone else starts wearing brief suits and bikinis.

We did it in the 1970's and 80's daring each other to wear ever shorter, shinier and more side split running shorts.