User blog comment:Summer55/maybe the constants are not humans/@comment-24152851-20150401111805/@comment-24152851-20150401131529

"Made of iron" is an expression, there's a trope for it. It doesn't literally mean they're made of iron. It just means characters can take more damage then they realistically should. Again, "universe" isn't literally another real life universe, it just means within each cartoon they have their own specific rules/laws.

You don't have to be so aggressive, I only commented on your blog because you were sad you didn't have many comments and I felt sorry for you. If you won't appreciate my opinion then I won't comment again.