It's mostly phsycological because I've seen it being made and at the end it's still too liquid.
Black pudding has an appearance and texture quite different from it's starting point.
I eaten fresh blood from the chicken and the pig cooked on it's own and I like it.
Mental block.
Same with Balut. I was OK with that until my sis-in-law opened up the egg to show me what I'd been eating.
On my birthday last December 8 my bro-in-law slaughtered and butchered a pig. To be honest I haven't eaten hardly any pork since then.