Why are gamecube discs so small?

instead of "cover" i'd call it a "casing" maybe

Low T

>easily

>They also spin the opposite direction of every other disc medium
really?

Yeah, case. Sorry. I'm ESL and I couldn't remember the proper word, lol.
Yes, easily. Remove the case, put the disc in it and turn on the GameCube. And try not to touch the disc with your tongue while it's spinning.