School never ends.
That is to say, the process of schooling continues for others after you graduate: but education never stops stalking you, either. Central to the neuroses of every educated human is the fear, deep and real, that school will someday be back to get you.
You’ll be caught unclothed and unprepared, and you will be tested. You will fail, because you are meant to fail. This is what we all secretly knew about school: it claims to offer the keys to agency, yet it is designed for subjugation.
Anyway, this is why Withers usually reads naked on the bus.