I had to do some research to figure out what story you are talking about:
Gabriel Garcia Marquez's short story "The Handsomest Drowned Man in the World"
I do not know the story, but your thesis seems clear. You are saying that the townspeople has weird superstition involving it. I am guessing that this is the main theme of the story. If so, it cannot be the main theme of your essay. Your thesis should give a unique perspective, not an obvious one. Can you write a thesis statement that perhaps no one has written before about this story?
Kevin, EssayForum.com