Seriously, don't arm your teen with this knowledge. You already know it's gonna be used against you.
Turns out around the age of 13, kids brains legitimately tune out the sound of their mothers' voice. Before then, kids and babies are honed in on their primary caregiver's voice. Once they get to adolescence, their brain is more focused on novel voices. So your teen really isn't just being a rebellious little sh-
Well. Not this time.
But listen up, bucko, since you're reading this despite the title (you little rebel, you) this is not an excuse to conveniently "not hear" your mom. Go wash the dishes. And get a hair cut.