@basedbagel - There's a theory about attraction to relatives. It's controversial, but so is every theory when it's new.
The human psyche is complex and nebulous, and we usually only learn about the brain/mind connection when something goes awry.
Anyway, the phenomenon is called GSA (genetic sexual attraction). And it has come to some prominence with the preponderance of broken families. Basically, because being raised apart from genetic relatives has become so common these days.
@basedbagel - The gist of it is, that we are evolutionarily hardwired to find those with similar traits to us, as more attractive. But being too similar is evolutionarily disadvantageous, because inbreeding causes genetic problems.
The way nature gets us close, but not too close, in terms of mating, is something called the Westermark effect. It was discovered in the Israeli Kibbutz (communes living together). Basically, a child won't grow up to find people sexually attractive, if they're ➡️
@basedbagel - It can go sideways like you wouldn't believe, and can drive a man quite mad for a time.
Cheers. 🍻