Interesting that the phrase began as 'care' killed the cat and has since evolved to curiosity. The word care at the time meant worry or sorrow rather than looking after someone. Click here for the origin of the phrase. Somewhere in the ages of whisper down the lane, the word care replaces curiosity and the phrase was filed in the arsenal of ignorance to answer those questions people preferred to avoid. Let's see, Mommy where do babies come from? Oh sweetie, curiosity killed the cat. Ten years later 'sweetie' remembers curiosity may kill a cat but doesn't realize her boyfriend is about to get her pregnant.
I know, a bit dramatic but you see where I'm going with this. It's 2013 and we know curiosity is as important to the evolution of our race as organic, all natural foods. So, all hail curiosity as the champion of ignorance! Let's stop the persecution of cats for their curiosity and kill the phrase instead!