My mother-in-law has a doctor's appointment today. She headed out the front door, then came right back in mumbling about needing a hat. Without even thinking about it, I said "You're really old. No one cares how big a rat's nest your hair is." There was a moment of horrified silence on her part before she rushed into the bathroom to check her hair.
I imagine I'll hear about this later from my wife, because her mommy won't say anything to me about it. She'll go scream at my wife about what a d*** I am.