What Weird Quirk Do You Have That You Didn’t Realize Until Someone Pointed It Out?

We've all got a few quirks...and the better you get to know someone, the more likely you are to point 'em out.

I didn't realize how often I smell stuff.  Like, "Hey Laura, check out this new stress ball shaped like a Buffalo I just got."  I will smell it.

I didn't realize I had a "radio voice" that I use when I'm around people I don't know or trust very well.  An old boyfriend pointed that out to me.

I turn the volume down on the radio in the car when I'm looking for a parking space. Like I'm going to "hear" the space calling me or something.

What weird quirk do you have that you never noticed until someone pointed it out?