Why Mental Age is not a Good Comparison to IQ

I don't know if "Mental Age" is a right analogy. There's certain biological factors that make that impossible. For instance, when you turn 18 and a half your body gets fat and begins to be sexually viable. And at 16 your hormones allow you to experience true love. At 23 your conscience is fully developed, and you can take more accountability for yourself. At 30 you become capable of understanding a bit deeper, and grow more mature. 30 was an interesting age, as a light bulb just clicked. You can see it on my blog, before 30, I was kind of silly, but then at 30 it just matured me instantaneously. I was reading old blog posts and could see the shift. You become more aware of evil at 30, and lose a lot of your naivety. And you also become less prone to worrying about social mistakes. You become significantly more aware of the other at 30, and I don't think that can exist even in a child prodigy. That's just not a good way of putting it.