The process is usually the idea for a short scene that expands then into a whole chapter. I wrote a whole chappy just about agriculture and three crop rotation system.
Mnh, it is a common meme that male authors love to establish a character is a woman by regularly mentioning how she has breasts.
And I was reading this book right now, The Girl on the Train, where the author also seems to make it awkward by regularly mentioning how the MC is taking a shower and then laying naked. Like multiple times, pretty much once every chapter.