Why couldn't Squidward say Spongebob's name to Squilliam when it was literally cleared out of Spongebob's mind in the first place? Because Spongebob was so hyper-competent that having to explain his own name might have blown Squidward's cover.
The little people running around in Spongebob's head is a vague representation of our body systems. Wherever there's a bodily function to be done, there are little tiny people running around to do it lest they lose their host.
When called "tubby", Patrick looks like he's about to burst into tears, before losing his temper and punching SpongeBob. What if the reason Patrick reacted so negatively is because he used to be bullied by being called fat, and SpongeBob - his best friend - doing so turned out to be his Rage Breaking Point?
Squilliam Returns
The Appetizer, consisting of mashed up fly bits, is horrifying enough as is. But when it gets bigger and gains sentience, it also contains a human foot. One must wonder where that even came from.
