Our teachers used to admonish us "no monkeying around" and "no horse play". The literal connection for the first was pretty obvious, even to us north american k

Our teachers used to admonish us "no monkeying around" and "no horse play". The literal connection for the first was pretty obvious, even to us north american kids, but I was in my twenties before I learned that the latter refers to geldings' preferred method of play: biting little bits of fur off each others' faces.