Have you ever noticed there being any more of you?

Funnily enough, that came up too, but I can't quite remember how.

I can. People were tasting each other's drinks, and somebody (I think doseybat) said "It's OK, I'm not infectious", leading to a discussion of what would happen if it were possible to catch general doseybat-ness or more generally for one person to catch another's essential nature as if it were a transmissible disease and (presumably) then turn into a copy of them.