Dr. Sebring: Let's see. The centipede can be considered a phallic symbol. Centipedes are very aggressive creatures. Their bite can be very painful. Maybe he's connecting the pain that a centipede inflicts with the pain inflicted on him through use of psychological and sexual abuse by his father.
Dr. Sebring: Sometimes people who are mentally challenged and have a history of sexual abuse... mutilate their own sexual organs.
Greg - Centipede #7: You can't do this. It's a film. The Human Centipede's a fucking film! He's gonna stitch us up. He's gonna stitch us up arse-to-mouth.
Martin's father: Stop them tears. You're just making daddy's willy harder.
