(Opinion solely based on experience in reading yaoi incests)
I can't rlly explain the 'why' since I don't think one needs a reason to enjoy a genre
buttttttt
As much as incest manga/anime goes, it's a work of fiction.
They don't look alike nor the thought of them 'actually related by blood' crosses my mind that much when I'm reading it. I'm guessing it's cuz I don't view them as a real human being lel
As for step-brothers... well... they *were* strangers before their parents remarried so.. No objection there
For I don’t really like incest there was only one manga with incest that I enjoyed but it only Fiction if it was really life that would be disgusting and I have brothers too I can never ever think of the as fuckable and I will never ship a sibling together so yeah I think people enjoy just because it’s Fiction but I don’t think they like it irl at least I don’t.
I don’t particularly read Incest but I guess people think its somewhat hot because it pretty much shows “true love” in some perspectives? I know it’s quite disturbing to others that you love your own siblings more than family, but each person has a different taste in what they do
(This is Just My opinion ;w;)
If you read incest and enjoy it please explain why. I am perplexed as a person with siblings why your think they're remotely fuckable. (If you understand the title I'm sorry) also please don't use the it's fiction excuse you bunch sound like lolicons