With age comes wisdom...
Overheard while flying the Philly Class B:
PHL Tower: US Air 123 cleared to land Runway 27R.
US Air 123: Cleared to land runway 26R.
PHL Tower: I wish we had a 26R. But you are cleared to land runway 27R.
US Air 123: Apologies, sir. Realized the mistake as it left my mouth and wished I could have taken it back.
PHL Tower: Understood. Something like that ended my first marriage.
Unknown: ... All of our first marriages.