Quote Originally Posted by honedright
When you run the thumb along the edge, the micro-serrations slightly bite into the superficial layer of skin and cause a "sticky" feel. It should be done lightly and not in one movement (that could result in a cut), but tiny, delicate "touches" along the entire blade with the thumb.
If you run your thumb ALONG a keen edge, there should be no drag no matter how lightly you touch the blade. In fact, the keen edge will slice your thumb, even with a very light touch. After all, it will cut a hair on contact with no sliding movement.

For the present purposes you can ignore the existence of the microserrations. The edge can be visualized as perfectly smooth. If you honed with an 8K stone, there are 8000 microserrations per inch. A hair will span 20 microserrations. I think it's pretty clear that they're not about to grab anything moving along the edge but will cut it very neatly.

If you lihtly slide your thumb across a sharp edge, like a fresh single edged razor blade (good for practice) you'll find that the edge won't let the finger slide but will grab and move with it. That's what we're looking for. But it has to be very pronounced, and you must feel an edge. A blade will grab some long before it's keen.