Theme for "porphyria's lover"

This poem was really sweet at first and I thought the theme was going to be love, But later you find out that in fact that is the irony of the story because it was about death to confine love. This story goes through a very fast emotional roller coster and it is hard to keep up if you only read it once. I really liked that the writer put all the descriptive moments that he did. I found that the theme was not developed until lines 35 - 45 when the man developed an idea to use the hair to kill the women. I feel there was a lot of thought put into this poem and it worked really good. Of course I was hoping that it ended happy but this is cool too. James Mills