I guess people expect furry honey select: easy some characters and make them fuck...
Maybe Illusion games Studio but I would not bet someone who made that kind of comment would like to learn that, seeing this is actually simpler...
I explained some pages ago, also there is the dev log video from the last week i think which is visual and has helped other people.
Steps are the snapshots, they are literally the same. And inside of each snapshot there are timelines.
Timelines can be used to create or simulate movements, breathing....Remember that facial expressions can only be moved by the "affected by penetration", well that no longer exits because you can use timelines to create better expressions.
Try to create a step and then inside of that step try to create a timeline (not the default one), later put the hand on some position on the second zero and then on another position on the second 1, and you will see how it moves.
For me it has help to create scenes more realistic, they are in that way less rigid