So the lady I'm staying with has two teenage sons and I encounter them only rarely when living here but I overheard a conversation while going to the bathroom

it was as follows:

younger teen: I'm gonna slap ya
older teen: I'm gonna slap ya
younger teen: I'm gonna slap ya
older teen: I'm gonna slap ya so hard dangnabit that it's gonna knock ya silly

they were just sitting at the kitchen table staring at each other while they did this

is this how teenage boys are

Yup

Can confirm