Pigs have nervous systems. Don't know where your cooking teacher got that. That is unless she's talking about pork chops.

That was a sick video, but like buttercup said, I'd take whatever PETA says with a grain of salt given the skeletons in THEIR closets. Killing animals and putting their carcasses in large freezers as opposed finding them furrever homes. PETA is beyond help and reproach.