WHY do we have earlobes?

WHY do we have earlobes? What is the evolution in this?

I'm not going any farther than this other than writing the question down. In the past, I've researched many q's like this one and found the answer, just sitting there in Google. This time, I find myself more than content just knowing the answer is there...if I ever really needed it ;)

today's challenge: write down your various questions - just for the sake of writing them down. when there is no pressing need to analyze or figure stuff out, sometimes it's fun to just express the interesting question. someone else may have great fun figuring it out!