Grammar point 1:

We use 'don't' for:
- First/second/third person plural (we/you/they)
- First/second person singular (I/you)

We use 'doesn't for:
-Third person plural singular (he/she/it)

Grammar point 2:

Double negative means a positive sentence, so the sentence "don't want none" is grammatically incorrect. It should be "Don't want any"

Figurative language:

The anaconda, as explained above, is a very large snake. It is an overt sexual reference to male genitalia, i.e. penis.

Interesting to note:

The anaconda kills its victims through squishing them to death, which makes this a poor metaphor. I've never known a penis to squish someone to death.

Please note: grammatically, this expression is also a double negative, which means it turns into a positive sentence, i.e. "we need an education".

Or is possibly shown ironically as the result of the current education system that proves they need an alternative education seeing the current one has made them grammatically incorrect.

This is a double negative, i.e. "not to do" and "no harm". This is not grammatically correct. The grammatically correct version should be "won't do any harm".

Double negatives usually mean a positive and should be avoided to prevent confusion.

In the case of song lyrics and poems, it's often called "poetic license", which means the artist or poet has 'permission' to be grammatically incorrect if it adds a better flow to the music.

Poetic license defined by dictionary.com: "liberty taken by a poet, prose writer, or other artist in deviating from rule, conventional form, logic, or fact, in order to produce a desired effect."

Other examples of the use of poetic license include Pink Floyd's song "Another Brick in the Wall", where the lyrics are "we don't need no education", which is ironic, because due to the double negative, it actually indicates they need an education.

This is a figurative expression, which means that the person goes to sleep with his/her secrets. The noun 'secret' is abstract, therefore cannot literally be seen, heard, tasted, touched or smelt tangiably with any of the five senses, which is why this expression is a figurative expression.

Many expressions which make use of abstract nouns are figurative expressions.

This is a double negative, i.e. "won't do" and "no harm". This is not grammatically correct. The grammatically correct version should be "won't do .. any harm".

Double negatives usually mean a positive and should be avoided to avoid confusion.

In the case of song lyrics and poems, it's often called "poetic license", which means the artist or poet has 'permission' to be grammatically incorrect if it adds a better flow to the music.

Poetic license defined by dictionary.com: "liberty taken by a poet, prose writer, or other artist in deviating from rule, conventional form, logic, or fact, in order to produce a desired effect."

Other examples of the use of poetic license include Pink Floyd's song "Another Brick in the Wall", where the lyrics are "we don't need no education", which is ironic, because due to the double negative, it actually indicates they need an education.