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There's no etymological information in your citation, nor indeed any reference at all to the term as used offensively, so while I am happy to concede that you are an authority on your second and third assertions, I await a more robust reference for the first.
Or, given that the term is widely understood and used as being offensive, we should just let it go.
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Did you read this part? Are you familiar with the OED?
b. slang (chiefly N. Amer.). A sweet or effeminate male; (in later use
chiefly) a weakling, a coward, a sissy. Also: a male homosexual. In
quot. 1904: a man likened to a house-cat; a dependent or
‘domesticated’ man.1904 ‘M. Corelli’ God's Good Man xxi, I shall invite Roxmouth and his
tame pussy, Mr. Marius Longford.I don't think it is a rad term to throw around, for what it's worth. Especially since the modern-day thrower arounder isn't thinking about cats.
Actual OED:
a. Chiefly colloq. A girl or woman exhibiting characteristics associated with a cat, esp. sweetness or amiability. Freq. used as a pet name or as a term of endearment. Cf. puss n.1 3, pussycat n. 3.
[1959 M. Richler Apprenticeship Duddy Kravitz i. ix. 50 Milty ran off crying... ‘What is it, pussy-lamb?’]
b. slang (chiefly N. Amer.). A sweet or effeminate male; (in later use chiefly) a weakling, a coward, a sissy. Also: a male homosexual.
In quot. 1904: a man likened to a house-cat; a dependent or ‘domesticated’ man.
2004 J. Meno Hairstyles of Damned 125, I..wanted to ask her to Homecoming, but I was a pussy and embarrassed about being in love with her because she was fat.