You haven't seen anything by Kern yet? He really is an icon of the New York Underground Cinema, you sure heard of him before, don't you? Maybe "The Bitches" (9/10 from me...) would be too harsh as an introduction. I would recommend "I hate you now" or "Fingered" which both got a litte "Nouvelle Vague"-touch and are not that explicit. But I can understand everybody who hates Kern - I even hated most of his films myself when I saw them for the first time.