I began to become an adult when I was 24 and got married and had children. That matures you, but I wouldn't say I was fully an adult until I was in my forties. The trouble with the whole adult debate is that if you're asking 18-year-olds to go out and fight wars for you then you can't deny them adult rights even though in sorts of other ways they wouldn't qualify until they were about 25. These days adolescence stretches much further into adulthood than it used to. There's no longer any encouragement to be mature.

As quoted in Elevator Music (1994) by Joseph Lanza.