Generalization

It is a thing that babies learn after crying once, and see that people attend to you.
It is a thing children learn after crying, to see that people shout at you before you do it.
It is a thing that boys learn not to cry, as it feels embarrassing when some girl laughs.
It is a thing that under-graduates learn to cry, as it helps to convince your profs sometimes.
It is a thing that men learn not to cry, as people dependent on you feel hopeless when you cry first.
It is a thing that old men learn not to cry, as nobody pays any attention towards it.

So, who are you?
baby, child, boy, UG, man or old-man?