The MIT bathroom was of the second variety.
I was unaware that the boys and girls shared bathrooms at MIT in 1981.
Seems to me that I have read that the coed dorms at many colleges have coed bathrooms.
Here is my coed bathroom story: On my first WESTPAC cruise, our first Japanese port of call was Yokosuka. Among other things, I decided to check out a department store, and, in due course, had to answer nature’s call.
I found the bathroom, and was doing my business at the urinal when a young Japanese woman stepped out of a stall right behind me. She, without giving me so much as a glance, went to the sink next to me and calmly washed her hands and left the bathroom.
Turns out that in Japan it was not a big deal — it was new to me, though!
Here in America, I cannot imagine that coed bathrooms in the general public would work.
I wonder how well they work in the college environment?