Here's why:
* Double Negative: The sentence uses two negatives ("does not" and "no") which creates a double negative. In standard English, double negatives are considered grammatically incorrect.
* Meaning: The sentence is trying to convey that something is not proper.
To correct the sentence, you can use either:
* "does not make proper"
* "makes no proper"
The best choice depends on the context of the sentence and the intended meaning.