People are like teeth.
Teeth grow whichever which way feels right to the individual mouth, and then at some point they get rearranged. With some study and some pain, they're shifted and sometimes even re-shaped, and eventually they're expected to line up and behave. Most of the time they do, until sometime in midlife when they decide they want to go back the way they once were. That's what my dentist told me is happening to my lower teeth, and now I'm looking at orthodontic work decades after my first round of braces came off.
We tell our kids they need braces just as we tell them they need to go to school and follow rules. We say it's for functionality but we also know it's because that's what society expects, and that's what will make others like you. People with crooked teeth are judged more quickly and more harshly than those with a Pepsodent smile, and so are people who don't fit the mold in personality, interests, and actions.
Fitting the mold makes life a lot easier. But sometimes, in midlife, something happens inside. It's often referred to as midlife crisis, and normally it's associated with extramarital affairs and fancy cars. But this midlife shift can be something much more personal and pervasive than that. It's subtle, and sometimes it takes a long time before even the slightest movement occurs, but eventually there's a part of you that says what the heck, I think I might want to go back to the way I was, even if it was a little crooked.
And then your dentist comes along and tells you to fix it once again.