I know what they are, but only because I used one as the reason a model was talking naughty pictures in my ebook, "The Painted Lady". Actually, I first read about them in a Johanna Lindsey romance, although I can't remember which one. I really need to reread her Malory backlist - I'm sure it's one of those randy guys - to find that book!
There were lists included in her pillowbook such as "Squalid Things", "Vexing Things", "Hateful Things", but I laughed at the "Embarassing Things" where she added an oafish lover:
"Lying awake at night, one says something to one's companion, who simply goes on sleeping."At least she doesn't complain about their snoring.