> “Every man has his humo(u)r.” I think this is the likely origin: https://en.wikipedia.org/wiki/Every_Man_in_His_Humour https://en.wikipedia.org/wiki/Every_Ma

> “Every man has his humo(u)r.” I think this is the likely origin: https://en.wikipedia.org/wiki/Every_Man_in_His_Humour https://en.wikipedia.org/wiki/Every_Man_in_His_Humour But I think I've also heard the "has" phrasing as a pun on https://en.wikipedia.org/wiki/Humorism https://en.wikipedia.org/wiki/Humorism