So I was originally going to post this as a comment to Mike's post but I had too much on it and couldn't think of anything else to write about.
This is in reference to the passage on pages 32 and 33 about Sethe and Halle having sex. The thing that surprised me most about that scene is that of all things that could be used as sexual imagery, Morrison chooses CORN. I don't really see the connection there but she made it work pretty well. I think it's significant that she writes the scene from an unbiased perspective ("the pulling down... the ear yielding," instead of "the yielding of his/her ear," etc) so that it seems distinctly mutual, as if one person is not dominating the scene, in sharp contrast to the rape scenes depicted in other parts of the book (including the "twelve white men" who raped Sethe's own mother) that definitely do not feature mutual participation. I'm probably going way too deeply into this, but since it's the blog I feel like I should: maybe the use of corn as the symbol is because corn first needs to be peeled from its sheath almost like Sethe needs to come out of her own shell and face her past. But I could be really wrong.