The title of this poem is "Crazy Songs". Why do poets sing crazily?

"My life is full of crazy songs. Who is the boss? " This is the first sentence that Chu and he met in the recently hit TV series "Bright Sword".

From Du Fu's "To Li Bai": "Qiu Lai cares about him, but he is not ashamed of Ge Hong for cinnabar. Who is arrogant when drinking crazy songs? "

Translation of Du Fu's Poem "Dedicated to Li Bai"

It's fall here. Look at each other.

Or wander like a floating canopy,

Cinnabar is not refined into elixir,

I can't help feeling ashamed of Guo Hong.

Drinking happily, singing crazily,

Waste time in vain.

Arrogant,

Who are you trying to be brave for