I linked this to give you a couple of girth exercises there are much better resources on jelqing. This barely scratches the surface.
However, that’s a fair point. At the time this was written I wasn’t differentiating between erection and engorgement. You’ll find a lot of people have posted with a similar blurring in language. You know you have an erection because there is a rigidity to it and if you found the Ted talk I mentioned previously you’ll understand some of the mechanics of that. It’s the directions of the fibers in the hydrostatic skeleton. If you haven’t here’s a link.
Diane Kelly: What we didn’t know about penis anatomy | TED Talk
So what do we call it when the penis is 100% engorged but not erect i.e. rigid? We don’t have a great way of describing that. So when you hear people talking about erections they are mostly talking about engorgement.
Then we have to deal with another point and that’s “erection level” or, more properly, engorgement level. I’ve often stated that I would tend to jelq at an 80%+ engorgement/erection level. But I’m speaking in volume terms and 20% is a lot less blood. Other people seem to have different descriptions of what 80% might mean which places it a lot closer to 100% engorgement. I’ve yet to understand this other method of defining engorgement, despite 20+ years discussing the subject. It seem amorphous.
To speak basically for a second, to jelq or do any other form of PE you don’t want to be erect (rigid) but you often need to be engorged and sometimes you’re aiming at engorgement levels greater than your erect volume. For example with the Horse 440 you trap blood in the penis to larger than 100% of erect level engorgement (a kegel helps). You then squeeze the glans somehow and the point of this is to restrict the volume of the upper CCs. You could alternatively pinch at another point in the shaft. The end result is engorgement in the rest of the CC at higher than 100%. It’s the same with a Uli#3 but instead of restricting the CCs at the glans you push a very tight grip further up the shaft.
Be very careful when you are playing with exercises like the Horse 440. Your penis can fail in unexpected ways. When doing a Horse 440 I would always apply the stationary grip behind the glans softly and push it down to the base, to deflate the superficial veins. I discovered this after rupturing one of these veins.
You’ll understand the difference between engorgement and erection a lot better if you try plumped bends. You can’t do an “erect bend” as they were often called in the past. The penis is too rigid. You’d cause the wrong kind of damage. You have to wait until that rigidity has faded. But you probably do want to be > 100% engorged and of course well heated.