Why is the last stage of mans life called second childishness

With his shining morning face and a small bag over his shoulder, he is walking slowly towards his school inching like a snail.As a man grows older, he gradually loses his senses of sight, hearing, smell, and taste, and this stage of his life is referred to as second childhood.In this stage he becomes like a child and it is his second childishness.He is always crying and vomiting in his nurse's arms.Explain the following lines briefly with reference to the context:

Shubham, added an answer, on 14/10/12.A textbook can be a wall between teacher and class 60.And then the lover, sighing like furnace, with a woeful ballad.Why is the last stage called a second childhood?What is the main idea of the seven ages of man?

This stage puts an end to the eventful life of man.Renuka, added an answer, on 2/3/15 1.The first stage of life is that of an infant.The last stage is called the second childhood.Vomiting is common among all babies.

In these lines, the poet describes the last stage of human beings.The second stage is that of a schoolboy who is complaining as he is not interested in going to his school.