The thing you have to understand about Stiles is that he says a lot of things.
He likes to talk because he hates it when it's quiet. It was quiet the night his mom left, silent in the way that's overpowering. Just the quiet purr of an engine starting and then… nothing.
So Stiles talks to keep everything back because he doesn't like to remember.
Scott gets that.
Because the one thing you have to understand about Scott is that his dad left him too, just not as quietly. There were broken dishes and crying and fighting and his mom's hysterical screams. The car runs over his bike on the way out with a sickening crunch.
Scott kept the broken training wheel because he doesn't want to let go.
But the thing you have to understand the most is that they're best friends. Through everything. No matter what.
Right…?