I have nothing to add to the discussion at large, so... I find the phrase, "I could care less" charming. I'm not sure if it was originally intended as simple

I have nothing to add to the discussion at large, so... I find the phrase, "I could care less" charming. I'm not sure if it was originally intended as simple sarcasm (or more likely a misspoken phrase) but to me in its form it has a gentle subtlety. A slightly tongue-in-cheek, "typically when discussing the amount I care about a topic, it falls within an average range. However on this particular topic, I care for it so little that I must be explicit that it would actually be possible for me to care less. For a more meaningful topic, such a statement wouldn't be necessary."