In Douglas Adam’s The Restaurant at the End of the Universe we meet a cow that not only wants to be eaten but is capable of telling diners that it is happy for them to do so.
In principle this ought to overcome any squeamishness that would be vegetarians might have about eating a dead animal, but in reality it is rather a horrifying thought.
At one medical school they have been doing something rather similar with the bodies used for dissection.
Dissecting a cadaver can be a traumatic time for medical students. In Western medical schools cadavers are usually anonymous, but at the University of Otago in New Zealand faculty have been experimenting with breaking this anonymity.
They found two patients who had decided to donate their bodies to medical education and recorded interviews with them. After the students had dissected their bodies, they were shown the tapes.