I would find parent/child sexual relationships a bit creepy, even if the child is an adult. But only slightly more so than other intergenerational relationships.
Sblings on the other hand, would be kind of cute. Right now that's still associated with creepy people because the social taboo and the law are strong enough to deter anyone who is not a complete loser, but if we would get rid of that stigma, and more balanced individuals would also be allowed to consider the option, I don't see why a relationship between a brother and sister would be more unhealthy than one between randomly chosen partners.
If anything, it would be even more stable, after all, friends and lovers change, but family is forever.
And with the Westermark effect, we still wouldn't even have to worry about even have to worry about too many people choosing their siblings over genetically viable partners.
Sblings on the other hand, would be kind of cute. Right now that's still associated with creepy people because the social taboo and the law are strong enough to deter anyone who is not a complete loser, but if we would get rid of that stigma, and more balanced individuals would also be allowed to consider the option, I don't see why a relationship between a brother and sister would be more unhealthy than one between randomly chosen partners.
If anything, it would be even more stable, after all, friends and lovers change, but family is forever.
And with the Westermark effect, we still wouldn't even have to worry about even have to worry about too many people choosing their siblings over genetically viable partners.