My mistake

So John David is no longer saying what the heck...but Sammy has taken over that department. I caught him twice today. When I brought it to his attention...he very politely said "my mistake, I meant to say what do you mean?" I had to hold back the laughter since I was in disciplining mode...but just add Sammy's voice to that and who wouldn't laugh at a four year old saying that. I'm sure if he wasn't my kid I would have been laughing my head off.