"you fit into me" by Margaret Atwood

Margaret Atwood is a Canadian writer who was born in 1939.  She is a witty author who takes sarcastic jabs at society.  She writes books, short stories, and poems.  She graduated from RadCliffe College (not affiliated with Daniel Radcliffe I'm sure).  In this poem, the first stanza seems optimistic and uplifting.  It seems to good to be true that "you fit into me" as if they were made to be together.  Atwood makes a comparison to a hook into an eye.  Something that is very hard to do.  Therefore,  nobody else can do what the other does.  Nobody else could fit into the "eye."    Then, there is a huge shift in tone in the second stanza.  The poem becomes very depressing and hate-filled.  The comparison gets skewed from a sweet sentiment to a harsh attack.  Instead of the second person completing the first, he or she is a major nuisance and hindrance. Now, the second person is crippling the other person.  The poem is short.  However, the poem is still impactful and leaves a message about how something that was enjoyable at first can turn out to be quite annoying.