system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel] Why do Venom/ Carnage and the others look like Spiderman?

It's a random alien species, right? Why the suit?
gpt
Iirc Venom's first interaction with humanity was Spiderman. He basically imprinted and that set the pattern going forward, not just in appearance but in the way it uses it's abilities. And Carnage was basically just something split off from Venom. 

Another example would be the gas-mask children from Eccleston's run as the Doctor.