I think you meant your last link to be this, from the same book which I can see only in snippet view:
… was a symbol for the penis. This symbol did not have to be explained to him. He attended a boys’ school where the boys used to refer to the penis as “nookie”. This neologism stood for “new key” and was well known to all the boys. The bloody key and keyhole correspond to the early conception of the female genitals as ...
There’s also this, from Anarchy Collective (Great Britain), Paul Avrich Collection (Library of Congress) - 1917 - Snippet view:
… to have very modest goals for society and myself, things like clean air and water, green grass, children with bright eyes, not being pushed around, useful work that suits one’s abilities, plain tasty food, and occasional satisfactory nookie.
The meaning isn’t explained, however.
edited in further quote