Foreign readers may wish to Google the origin of this phrase.
Younger spanking enthusiasts puzzel out how to spank without the kids hearing. Empty nesters don't have that problem, but sooner or later men lose the ability to enjoy late evening activities. Still older men lose the ability to maintain an erection without the aid of little blue pills. I am so thankful that some studied chemistry!
We are feeling the effects of maturing, but we can still cut the mustard. Not as late in the day as we once could and not as often as we once could. Heck, to be honest we are not even as good once as we once were. But, we still enjoy playing the game.