Just don't ask him "Who's your daddy?" in bed. In fact, just don't mention parents at all.
The Penguin's gonna sleep with the fishes.
Video Batman Chooses His VoiceNovember 08, 2011
You don't get an awesome gravelly voice on the first try.
Video Batman's Bad DayMay 16, 2013
At least he didn't lose any more parents.
They're both super, but only one can be supest.