Here goes: The difference between your twenties and your teens is that you spend most of your time as a teenager despising rules and trying to defy your parents, just for the sake of defiance. You must experience things to have them proven to you, and you’re pretty sure your parents are wrong about everything, so whatever they say is bad is actually fun. And eventually, around 18, you get to do all of those things and it’s great for two years or so.
Then somewhere in your early twenties, you start to realize that your parents had some points about things, like using hangers. And so you still do the stuff they said I’m telling you, don’t do that about, but you start to get that rules weren’t invented to ruin your life. And many times you hear yourself say, “Why do I keep doing this?”
Late twenties, and I assume the early thirties, are the land of realizing that, yes, you can still do the stuff you weren’t supposed to do, but you start actually thinking before you act most of the time. Things like getting up in the morning become important. Things like knowing your account balances become necessary and not at all dorky. You realize you can still do the things you weren’t supposed to, but you often make the conscious decision not to do these things. And when you do them, because you’re out of practice, there’s an increasing cost. For instance, if you stay up late watching silly TV and eat a bunch of red velvet twinkies before falling into a sugar-coma on a friend’s couch, the next day you’re going to be cranky, sore, and weigh 800 pounds. (I mean, just as an example).
I guess this is how growing up happens.