Well personally, when it comes to fav sub-genres in yaoi incest is my favs of all favs however I would feel a great discomfort in real life if sisters or brothers are having such a relationship. Fictional is okay for me real life is something that should never ever ever ever and I mean ever happen oh Yh and I dislike dad X son type of incest kind of puts me off but that's just me though.
I think a lot of it also has to do with power dynamics because most cases of incest that we hear of are an older person grooming, molesting, and raping a much younger person. So I think this is the actual reason. So yes siblings can have this relationship, but most of the time it isn't a "relationship," but sexual abuse. I only know of one case in Germany (where incest is illegal) where siblings started a family by their choice, but the sister was mentally handicapped so it's still questionable. All their children ended up with mental and physical disabilities too so it was a sad situation. In the end I think incest relationships that are truly mutual are very rare.
I get what you're saying, and totally respect your opinion, but i just can't with incest. Even if there's no children-making involved, the thought of wanting to fuck someone who shares your genes is really really strange to me. I don't really have a problem with it when it comes to fiction, it's not real so do whatever you want. But if someone i know told me they had sex with their sibling i would be very grossed out tbh.
I will agree with that. A man once wrote to dear abby that he and his twin brother were in love and in a relationship and she made that exact same point. Since they could not have children, and they were in love, it was no problem. He was wondering what to say to people about the two of them never dating or getting married (they were keeping their love a secret) and she told him to simply tell others, they are happy being single and rooming together and that was that.
there are two other reasons incest is considered taboo
a lot of incest IRL is just an older family member taking advantage of a younger family member (i.e. sexual abuse)
incest leads to an imbalance in family dynamics
we love you so much.
like the real reason we reject incest logically because of the congenital diseases that can acure from it , but if the people involved in it from same gender then having children is not possibility so their no reason to reject two brothers or two sisters having such relationship ... off course this my own opinion and other's don't have to agree with me .