Oh, my running theory on the significance of minfding one's Ps and Qs.... There was this one Reverend Spooner who renowned for mixing things up in a particular fashion: he would get the first consonent of two words right, but then he would somehow swap the rest of the words around. Anyway he was apparently giving sermon about how taking care of responsibilities was important, how, in order to take care of the church he always minded his pews and keys. Or at least that is what he meant. Instead the congregation went home genuinely intent on minding their own Ps and Qs. And that is why that kind of word play is call a Spoonerism. But i might have gotten something backwards there...