Yes, putting on a mask is a social norm on par with removing a hat. It is not a social norm on par with clitorectomy.
Espola mentioned a rational cow. I’m going to go see if I can find it. Perhaps the two of us can have a nice discussion.
The usual cliche is "horse left the barn", but I am seeking every chance to use "cow" since Vermont dairy farmer Elle Purrier St Pierre qualified for the Olympics in the Women's 1500 meters yesterday.