Possibly, it meant "please" and "excuse me", young children would pronounce them as Ps and Qs.
Young children would pronounce them as Ps and Qs. Possibly, it meant and "excuse me."
Possibly, it meant and "excuse me." Young children would pronounce them as Ps and Qs.
Possibly, it meant and "excuse me." Young children would pronounce them as Ps and Qs.