[BrandtMichaels]

Lefty loosey, righty tighty works until the motion
could loosen the threads. Most common exception is
the left side pedal on a bicycle.

[BlueLancer]

Most common exception is the left side pedal on a bicycle.

I've also found that a significant exception is attaching the flow line nut to the regulator of my daughter's propane tanks. It took me awhile to remember that, especially when trying to remove it to refill the tank.

[LastDayz]

As well as some fan clutches.