Consentual Cannibalism

Can a consenting adult give another consenting adult the permission to eat his liver with some fava beans?

In what has got to be the freakiest story of all time, one Armin Meiwes, a German (can you say the byproduct of repression, people?) has confessed to killing someone who he met through the Personals. In the ad, Meiwes wrote looking for someone to meet and eat. Yuuuck!

How does Graydon Cater's libertarianism weigh on this one?