The side of my teen that feeds my homicidal tendencies

Responding to a simple request:
"Why do I have to?"

Not going for the "it's not worth explaining, just do it" response, insisting on details as to why he should fulfill the request:
"So? If you explain everything then there will be no misunderstandings and there will be more peace in the world."

Different situation fifteen minutes later, being made to participate in clearing up a misunderstanding (completely unrelated to the earlier request):

"WHY DO YOU HAVE TO EXPLAIN EVERYTHING?! No! NO! I'm not going to listen to this...JUST STOP MAKING A BIG DEAL OUT OF EVERYTHING!"