"trans people still can't serve in the US military" You mean people who intend to, are transitioning, or who have? Because if it's the second option, seems like there's a few good reasons (huge mood swings, poor ability to -cope- with said mood swings, unreliable physical performance).
"do a three-way makeout session in a high-traffic public area"
I presume you mean high foot traffic, because the alternative (say, on a roundabout) would make it materially harder to drive safely.
It's interesting that all of your examples seem connectable to hygiene.
I seem to remember someone posting research before, that connected people's sense of morality directly with their sense of hygiene (that is, morally problematic acts actually -felt- physically dirty). Wish I could recall the link.
"Transgender individuals are prohibited from entering military service by medical regulations. To join the military, potential service members are required to undergo a physical examination as part of the entry process. During this examination, the military may reject the potential service member if he or she has had any type of genital surgery. "
And, yes, I'd meant foot traffic. I find major bus/train stops, and parks, both work well for this purpose.
I've read the same hygiene article, bu I'm not sure what would be weird and NOT technically a te...
Here is a new post at EconLog in which Bryan Caplan discusses how signalling contributes to the status quo bias.