Just Some Thoughts...
Just been thinking...That in reality, nobody can be told to act his or her age. They just act the way they are, but often than not, they do not characteristically act their age.
Children are just like teenagers. They have their own childish fads and they always want to be like their friends. Teenagers always want to act older, and be seen as an adult. Trying to get into a relationship as quickly as possible, trying to make decisions on their own. But they ultimately act like overgrown children and make a total fool of themselves. Adults, especially middle-aged ones, want to act as though they are 16. Yearning to be young and youthful. Complaining and constantly reminscing their youth. After all this, they end up remorseful and bitter. Finally, the elderly, they don't act their age not because they don't want to, but they have no choice. With illnesses like Alzheimer's Disease creeping in, it is not a surprise that some old people can act like babies.
Age is a relative sort of thing. One should not be confined to his physical age, but also they should also sometimes reflect on their actions, to avoid the mistake of "not acting their age".