Once Bitten, Twice Shy
Once bitten, twice shy
hiding behind the counter] Okay, don't try anything funny.
I'm armed to the teeth. -- Apu, once bitten twice shy, "Krusty the Clow...
Measure twice, cut once.
Once a philosopher, twice a pervert. -- Voltaire
Hear twice before you speak once.
I had amnesia once or twice. -- Steven Wrigh
Once is an accident, twice is coincidence, thrice is enemy action.
Press [ENTER] once to quit or twice to save changes.
Try everything once... Try the fun stuff twice...
Heating with wood, you get warm twice: Once chopping it, and once stacking it.