This Sonnet is written by Shakespeare, and belongs to his Marriage Sonnets.

It is organized into three quatrains and a final rhyming couplet; infact, it is an Elizabethan Sonnet.

In the first quatrain the interlocutor gives a piece of advice to his addresser who is a beautiful and young man.

Its function is to introduce the argument of the Sonnet: In this case the interlocutor invites the man to have a baby and so, bless a mother.

In the second quatrain he supported his thought and tries to persuade the man: he underlines the importance of the posterity.

In the third, and last, quatrain the speaking voice says that the age of the man is the better to becomes dad and so, passes on his beauty.

In the final rhyming couplet the interlocutor invites again the beautiful man.

Through this Sonnet, we can understand that Shakespeare likes the man, and he hopes that this man becomes husband and dad to pass on his beauty.