Tangent - My definition of "adult" that I came up with as an early teen:
"When I realize I'm looking in the _driver's seat_ of passing cars hoping to see pretty girls, that will mean I'm `an adult`.".
Years later I had a palpable shock moment in which I glanced in a car and remembered coming up with the definition. "OH CRAP I'm an adult!"
Felt like a "hoist by my own petard" moment.