Chell can't be deaf. On two occasions Wheatley asks her to turn around while he does his thing and waits for her to comply, and the clue to the final boss is delivered through an audio recording.

Of course I'm ignoring the excellent player training integrated into the game's design, but the OOP is ignoring the player (probably) not being deaf and considering only the in-game events.

I prefer the read where GladOS is a hostile mother figure being all disapproving and passive-aggressive and eventually bonding over an even worse set of male partners proving to be way worse than their differences. Fits the story way better than the lovers angle.

During the intro sequence of Portal 2 there's a section where a pre-recorded voice asks her to perform some actions and won't progress until you do. Things like "look up when you hear the buzzer" or "There's a framed painting on the wall, please go stand in front of it"

It is a little known fact that the portal gun was originally developed for the purpose of signing around corners

GLaDOS is a bottom

When you smoke weed, play portal and forget to put your headphones on.

Don't do drugs