On Wednesdays, we wear school uniform.
The Plastics would not have worn pink on Wednesdays, because they would have been sent home for not being in uniform.
SNL Studios
They probably would have rebelled by just wearing pink socks or something.
But eventually they would have got in trouble for that too, so just resorted to wearing pink underwear under their definitely not-fetch skirts and sweatshirts.
anythingbuttheist.blogspot.co.uk / SNL Studios / Alex Finnis / BuzzFeed