Teeth (2007)

'Teeth' can't help but feel like it was delivered from the 1980's. Sexploitation, spurting blood, cruel/horny teenagers, revenge. Dawn (Jess Wexler) is the school spokeswoman for celibacy. But her own horniness is over-taken by the new boy, who's own quivering horniness is barely disguised by his vow of "purity". When an innocent make-out session becomes a desperate date-rape attempt ("I HAVEN'T JERKED OFF SINCE EASTER!!!!"), Dawn discovers she has the cure for rapists - Vagina Dentata! She slowly makes victims of every unsuspecting perpetrator, which becomes increasingly graphic and funny. One fellow purist becomes hilariously unraveled as he gets cocky (sorry, i couldn't help it) while finally pleasing Dawn sexually. You can guess what his fate is.
Most '80's cult-horrors are funny because they're so bad. 'Teeth' deliberately delivers the laughs, making it seem a little contrived at times. But it has enough oddities to realign things: the backyard, nuclear power plant; the cult-like "purists"; and the sickly mother. Lenny Von Dohlen, looking exactly like he did as sad-sack Harold Smith on 'Twin Peaks', is a welcome cameo. But the crowning jewel of supporting players is 'Nip/Tuck''s John Hensley, who plays Dawn's hopelessly white trash step-brother with enough conviction to actually wish him dead. We all know how he'll end up. But spending the film watching his malevolence is as seat-squirming as it is mystifying. If you liked this, make sure you've also seen 'May'.