In the olden days, the doc would hold your nuts and tell you to turn your head and cough. This was to detect if you had a hernia (which was a medical exception).

The bunghole inspection was to see if you were the receptive partner in anal intercourse because being a gay man was a criminal offense.

Allegedly, lesbianism was never outlawed because Queen Victoria was so offended by the idea of it that she prohibited the legislation from even being heard in Parliament.

https://en.wikipedia.org/wiki/Royal_assent

How do you even conclude from inspecting a butthole that it is "a receptive one"? Every man was one butthole inspection away from being a criminal?

I mean if a poo can get out, something of its size can also go in, and quality toilet paper was not that available at all historically.