Fundamentally, this is a hygiene issue, not a moral issue. I simply wouldn't be comfortable placing my naked parts in a place a stranger's naked parts recently vacated.
If you want to understand Leftism -- and everyone needs to because it has been the most dynamic religion of the last one hundred years -- one good place to start is with San Francisco.
Or perhaps more precisely -- with nudity.
And even more precisely -- with public nudity.
Last month, the San Francisco Board of Supervisors voted by the barest (pun not intended) margin -- 6 to 5 -- to ban public nudity. By public nudity, the law refers only to displaying one's genitals in public. San Francisco women are still free to walk around topless. But that is not unique...
It is also a personal and private issue.
But it effects public health.