no one ever tells u how to do stuff

[isis_Bleach]

society just expects u to know

but when ur a reject who never had any friends or family

then u just dont know

 

[Sett]

society just expects u to know

but when ur a reject who never had any friends or family

then u just dont know

They build a cage around you until you are 18, mandatory school, etiquettes, do this do that, follow this example, etc.
After that you are free to do as you please. The cage is gone!

but your behavior remains the same.

you have been forced to accept the fate they've molded out for you, so now although you are free, you are mentally still in that cage, and you realize that the only thing you know is the cage, so you are afraid of the exterior.