I did not read all of the poem (I really don't like poems), but in this case from what I did read, I feel the use of whore so many times is purposeful as it compounds the point and drives it home. Poems also function differently than normal writing/story writing, so repetition is acceptable as long as it serves a point/is tasteful; more accurately as long as it serves a point. Many poems I have seen use repetition a lot, rather like songs in a sense that repeat lyrics over and over, in whatever form. Then again like story writing, everyone who is into poetry has their own idea how how poetry should be >.< . I know of one English teacher who thinks that way... a real jerk. Anyways... that's my two cents.
