Saturday, August 06, 2011
Best behavior changes on a cultural basis. "If you were 'minding your Ps and Qs', what would you be doing?
Your answer: being on your best behavior
The origin of the saying is not certain, but it is English, and possibly comes from either the printing or licensed trades. It is usually said in the context of reminding small children to be polite, also known as 'minding your manners'." - Funtrivia.com