My 5 year-old daughter wrote this sentence for one of her spelling words the other night:
The butterfly's sight was hot grass.
I thought it was fine. My wife did not. What say you - is this proper English?
It depends on what the author believes is "a good and proper sentence." If it means that the sentence is grammatically correct, then the sentence is good and proper. If it means that it is both grammatically correct and sensical to a developed human being, then it is not good and proper. Then again, the word "good" is subjective - so in the end, it is up to the author to decide.