This is an excellent idea as far as sanitation (and eroticism) is concerned!!!
I believe the idea of guys wearing just "trunks" (and a bikini for girls) as swim suits came about in the 1930s to minimize the amount of fabric and suspended lint in the pool water and keep the filtration system clean.
In fact, when Adolf Keifer and Roy Jacuzzi proposed the modern swimming pool, their approach was toward more nudity because it minimized the amount of lint in the system and there would be fewer places for bacteria to hide.
Just look at the amount of gunk in the filter of a washing machine VS what collects in the bottom of a shower and it's obvious that nuder swimming is better.
