The doctor never told me, when I was five years old and bawling from strep tests, that the most important development that occurs after puberty is not adulthood--it is the striking advance of shadiness upon one's life, liberty, and happiness. You see, as one progesses into the late teens and early-to-mid twenties, there is a proliferation of shadiness unparalleled in nature, with the lone exception of the mind-numbingly rapid procreation of grizzly bears.
The reason my doctor did not tell me this, though--and didn't tell you, either--is because there is no medical cure for shadiness. Rather, for the purposes of this discussion, let us say that the only way to combat shadiness is by employing its polar opposite--sunniness. Therefore, it is up to us, the curiously enshaded generation, to wear tasteful sun visors in all seasons, and fight the shade into bright oblivion.