I don’t understand what the different is.

Night and days we all here people calling others a pussy, for what ever reason they might have. And no one really bats an eye to it. But as soon as someone drops the “C word”, it’s cringe worthy? Why? They literally are the same thing? It’s it because of how the word sounds? How it ends so sharply? It drives me crazy, because even I won’t say it, and I don’t care!