Cis apparently means this side, and in the Latin is opposed to both trans- and ultra-.
The mere use of the word Cis- appears to be a propagandistic attempt at trans-normativity.
Here is the thing: heterosexuality is the norm in all of human history, and around the world. There have been cultures–like Ancient Greece and 19th century English Public Schools–where homoeroticism was common, but it was never the default. All the Athenians and Spartans who diggled each other out in the fields came home to wives. And all the Public School boys eventually settled down to wives and parenthood, with maybe the occasional revisit to the Down Low.
The people pushing all of this abusive confusion are enormously wealthy, and using for distribution people who lack moral compasses.
And they are succeeding. I read the other day something like 40% of kids under 25 or so identify as something other than sexually healthy heterosexuals.
And this of course all goes with the huge reduction in sexual activity itself. They “identify” as something, but what they do with their genitalia is largely nothing. So seems likely, not least because in the boys, who normally drive most sexual activity, testosterone is present in only very small amounts, for a variety of reasons.
Sexuality, on this reading, is about parading, about signaling, about getting attention, but not getting laid. That is so last decade and last century.