"I am not a teenager, I am 18!"
He wont accept that you can be legally an adult AND a teen at the same time, he maintains that once you hit 18 you become an adult and not a teenager.
I love him, I do. But give me fucking strength......
Even his 12 year old sister was eye rolling and thinks he is an idiot (in fairness, I think she has probably always thought he is an idiot but now, moreso)
ETA....obviously (although probably not to some) lighthearted.