Me.
I do blush on occasion.
Have not blushed for decades (maybe the odd little one someday), but the last few years it’s back.
Usually when I’m, very suddenly, the center of attention.
It was years ago: We had guests over and we were all drinking, laughing and having a great time. I still don’t know how it happened other than I was drunk and feeling no pain at all. I fell face-first into the crotch of the friend’s wife. She was sitting across from me. It got great laughs from those there.