I watched the Human Centipede and Teeth in the last 24 hours. One was a dare for my nephew and the other was 'cause I couldn't believe they actually made that movie. Turns out niether was for a good enough reason.
Both of them look too much like niche porn someone attempted to market as a horror movie (probably to get a bigger budget.) I haven't felt the need to actually watch them to evaluate the validity of my assumption but since you have, how far off was I?