I come across stuff like this all the time when reading about history. It keeps reinforcing to me that our current time period is not some Sodom/Gomorrah/Babylon where we keep inventing new perversions and setting low bars for degenerate behavior. We can find all of this stuff in all places and at all times. Greek and Romans were frequently bisexual and often pedophiles by today's standards. Royal families and nobility were notoriously incestuous. Homosexuality was common if not advertised in pretty much all places and times. Many Native American tribes included a third gender for people who didn't fit as male or female. And on and on.

I'm not trying to applaud this or say that it is good. It's all sinful. But it does help to remember that nothing is new under the sun, and there never was a golden age were Christian sexual morality was the norm.