system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel] Since Galactus appears different across the universe to different races and species, why do most humans view him as a giant-pink-helmet-wearing-weirdo?

So I read that Galactus doesn't actually look like a wacky dude in a weird constume, it's just that he's perceived differently for different species across the universe. Which makes me ask, why do then humans associate this force of nature with such a wacky look? Why does he have antlers on his helmet? Why is his mouth visible? I mean, why would you even think that....THING is a human? What's up with his outfit? Why's it pink and blue? And most of all, why is everyone perceiving him the same way?(are they?)

You give someone a description of Galactus and what he can do, no one would associate him with how he looks in the comics. So tell me why humans think he looks like that?
gpt
In much the way that he has heralds, Galactus also chooses one person on the worlds he visits, using their thoughts and imagination to determine his form.  On Earth, his form was chosen by a brilliantly creative, but struggling artist named Jack Kirby.

(This idea was later stolen in another dimension by Gozer the Gozerian...)