Prion diseases. Accumulation of different substances, like mercury, lead, strontium-90, and, a new contender to the list: micro plastics. And you'll want to have a look at a person's medication and likely want to make sure they've been off of it for a few days before consuming their flesh.
Endocannibalism - eating people from your own group -has been practised as a respectful part of funerial traditions by a handful of cultures across the world and may have been more widespread in prehistory.
idk man I think the mental gymnastics go the other way around here. You have to make a shit load of assumptions to consume human flesh safely and ethically:
the person being eaten consents to their body being eaten
the person has no family or each and every one of their relatives consents and is totally ok with their loved one's body ending up in a casserole
the person has no diseases that can be transmitted by consuming some or all parts of their body: prion disease (brain), AIDS, hepatitis and loads other blood-transmitted illnesses, to name a few obvious ones
there are no drugs or medications in the person's body that could be absorbed into your system (regurgitated meth, yummy!)
you have the means to effectively and safely process or cook the body yourself or we set up an entire new industry around mass human body consumption which sounds like the plot of a Stephen King novel tbh
As some have pointed out here, if eating human meat is your only available choice in an extreme life-or-death survival situation, it would have to do, but unless you also have the means to carve up and cook the body, you're actually going to consume more energy digesting the raw flesh than what you're getting in return. Humans make for rather poor food overall, that's a fact. I would back this up with some evidence but I don't feel like being put on a list for looking up the nutritional contents of human bodies lol
If I'm dead, I absolutely would have no quarrels with people eating my body. Nothing to complain about since I hold no beliefs that when I die, my body needs to be intact for me to go to a heaven like place.
Also, who cares what any family members would think. It's my body, not theirs. If I don't mind people nibbling on my corpse, then I'd hope any family that cares about me is able to respect that wish.
My main gripe is that humans don't have much meat on them. It works in a pinch, but the effort needed to eat so far outside of our normal pallette isn't worth it.
That said, I would be in favor of letting nature decompose our bodies more. I hate having to waste so much effort on disposing of bodies, especially once I die. I want my body to get torn apart by animals, not buried with holy rites. Mummification is the only burial practice that seems kinda cool. Cremation seems unnecessary, especially if I can get eaten by something instead. Just take what's useful, chop me up a bit, and throw me in the compost!
I remember seeing someone get a callout post on Twitter for saying they don't see an ethical problem with cannibalism if it's consensual. That's all they said, and they got dogpiled so hard that they apologized and went to therapy for their "unnatural thoughts", and the callouts continued.
Unless several Twitter users plan to give them unrestricted access to their corpse soon, I don't see why that's callout-worthy.
Prions are a big problem for cannibalism since they resist high temperature. So they're still deadly even if the "meat" is well cooked.
That said, Bones And All was a great film about cannibalism. And it was romantic, in a fucked-up way.
Heh, my partner and I have already had the, "I don't seek it out, but if we're life-and-death stranded and you go first, sorry, you're provisions now" conversation.
When the German cannibal Armin Meiwes was on trial, it was actually a legal conundrum. Meiwes' victim had explicitly consented to being killed and eaten, even dictating how he wanted to have it done to himself. So was it murder or more of a convoluted version of assisted suicide ("killing on demand" is the legal term in Germany)? He was eventually convicted of manslaughter and got a prison sentence of eight and a half years, a few years later changed to a sentence for life.