There’s kind of my point. It is a societal construct, one largely tied to religion and thus easily mapped to religious expansion across the globe.
“Normal” for things like this is meaningless, because it is entirely based in arbitrary beliefs, not anything inherent in being human. It is based entirely on fake limits we’ve imposed on ourselves as a culture, nothing more.
This is really only “abnormal” in a traditional, Christianity-based modern societal culture, and that’s nowhere near the entire world.
Let’s get that full quoted sentence instead of the two worda out of context that let you post the link you wanted.
Didn’t even need the whole sentence, just the word before those… “Across all species”.