An alien equivalent of a lawyer is studying up on various human court cases and stumbles upon a series of cases from family courts dated up to the mid 2030s citing "deviant sexual attitudes" or "deviant sexuality" as reasons for being an unsuitable parent. Upon consultation with its human liaison as to the nature of these cases, the alien discovers the murky and dark legal situations around kinks. -- Anon Guest
For those seeking further proof of Human Insanity, look no further than their legal records. -- Common saying amongst the Legistrar Major.
Darael was studying up for Xenolegal history, and had wound up on a wiki walk into the deepest of deep labyrinths. Humanity was like a train wreck. Fascinating from a distance, but horrifying at close range. Everyone knew the one about the hot coffee, but some of these...
Humanity - a species not naturally inclined to mate for life, invented marriage as a means of cementing relationships between polities via familial alliances. Then they traditionalised it. Then they invented divorce as a means of sundering those alliances. Often messily, loudly, and with numerous parties dragging others through the mud in the process, because property ownership was often tied solely to one gender. Which was clearly a messed up way of arranging things.