Always wear underwear? Is that for Bill Clinton?
Was taught by sarcastic old prep school Latin Masters in the '60's (that I personally know of) and probably for several hundred years before.
In fact, wife and I had our first date at a cold, rainy college football game. She asked to borrow my sweater.
While gallantly handing her the garment I said, "Semper ubi . . ."
Without missing a beat she replied, "Sub ubi!!!"
It was love at first cite.