An example of a blip in register:
In
Kingfishers Catch Fire, published in 1953 but set in the 1930s, author Rumer Godden goes further than most authors in describing the absence of toilet facilities in a house in Kashmir.
She mentions the English family (widow with two children) using receptacles in the bathroom, and those receptacles being emptied out by an Indian of the sweeper caste. The sweeper and the other servants are bewildered when the widow insists on a pit being dug at the back of the garden, the waste emptied into it, and lime thrown on top.
The Indian lady who looks after the two children is described as rising early each day to go outside and defecate.
All this is done without use of specific vocabulary. However, there's a passage in which the widow is shocked to see Kashmiri men urinating into a stream. The author uses "piss".
That surprised me. I was even more surprised when, a few pages later on, she describes Kashmiri boys and girls who "make water" in public.
Men piss, children make water.
Horses sweat, men perspire, and ladies glow.