So I was wondering how pussy came to be associated with the vagina. This is what I found :
Where Does the Word Pussy Come From and Should Feminists Really Use It?
The origin of the word
pussy is pretty hotly debated.
One theory suggests that it originally came from the Old Norse word
puss, which means “pocket pouch”—which sounds legit.
Others have suggested that the word
comes from pusillanimous, which means cowardly. That theory also holds water (though perhaps not as well as a pocket pouch), considering that when
pussy popped up in regular dialogue around the sixteenth century, it didn’t have a sexual connotation at all. In fact, it was used as a term of endearment to describe women in general and didn’t actually get sexual until the nineteenth century.
So how does a term derived from something as benign as in-clothing storage become one of the most controversial words in the English language? Through porn, of course!
As pornographic films permeated society, so too did
pussy, this time deployed as a "pretty" word used by men in porn to describe female genitalia. Language is constantly evolving—that’s how it survives—so it’s par for the course that
pussy would change meaning over time.
https://www.glamour.com/story/origin-of-the-word-pussy