The simplest thing would be to simply drop the idea of sexed public restrooms. In my preschool, we had a communal restroom - boys and girls. Boys would pee into the same toilet, and girls would sit on their potties. It felt isolating - I envied the boys because they were clearly enjoying the ritual of peeing together! I tried peeing standing into the toilet at home to see if I could... failed MISERABLY... and with that, accepted my femininity without holding grudges .

But seriously - it would not be a big deal to me to go to the bathroom that is open to both women and men. How many times did I find myself waiting in a LOOOOOOONG line to the ladies' room at a theater - in most theaters, there aren't more stalls for women, even though it is obvious that women take longer to use the bathrooms - think of menstrual needs, primping, and dealing with elaborate clothing (I personally do not primp, wear elaborate clothing, or have menstrual needs (since Mirena IUD removed my periods), but other women surely can take their sweet time). So I would wait in that LOOOOOOOONG line while secretly wishing to use the men's restroom that has NO line at all. But no!

So either businesses should have more stalls in women's restrooms, or we should just give up this hangup about sexed restrooms. After all, there are stalls with doors - if men don't want to pee into urinals if women are present, they can use stalls and close the door for privacy.

Speaking of privacy - I went to school in the Soviet Union and while we had sexed public restrooms, we did not have doors - people used the stalls without doors (there were tall dividers that separate stalls from one another, but no doors). And, did not die from it, to the best of my knowledge. I do not know anybody who'd die from it - seriously, and I knew lots of people my age.

Getting rid of sexed public restrooms would be much simpler, transaction-cost-wise, than the current California trend towards providing both sexed public restrooms for the use of multiple people at once AND a private, one-person restroom to accommodate people who are transitioning and are not comfortable in either Ladies' or Gents' rooms.

Far simpler!

But somehow this radical simplification is not being discussed enough.