I posted once before about ball jelqing and how affective it was for size enhancement, but I think by calling it ball jelqing people didn't think it made much sense. After all, unlike the penis with its corpus spongiosum and corpora cavernosa chambers, our testicles don't have anything remotely like that. Therefore, jelqing them sounds pretty fruitless, if not downright stupid.
The reason it has worked for me, and worked remarkably well, is that I am convinced that stretching the spermatic cord, and forcing your testicles down to the bottom of your scrotum, that that duel action stretches the sac and the cord, and while they are both quite pliable, lengthens them permanently (or at least as long as you continue doing it). I only called it jelqing because it does take on some of the same characteristics.
Before I started doing "ball stretches", probably 60% of the time my testicles were pretty much turtled and tight against my body. When I got an erection, they immediately became tight as a drum. If the room I was sitting or lying in was hot, and if I was wearing loose clothing, and I went to take a leak, yea they hung pretty nicely. But that was pretty much the only time they did, and when they did, I sure wished I could look like that more often. Since I have been doing these stretches, my testicles hang just I like I had wanted them to, probably 70% of the time, if not more. When I am erect and my wife is playing with my penis, now she has two balls she can play with also. Obviously just like our flaccid penises, balls don't always hang the same way all the time. No one can tell me that a guy getting undressed in front of his lady with a nicely hung flaccid penis and a set of swaying balls to go along with them, doesn't get her juices flowing really quick.
I have read were some guys claimed some sac size improvement by grabbing the skin below the testes and pulling on it. Couple of things with that, namely, you have to have extra skin down there to pull, and also, it does nothing for your testes. Having a larger sac, only to have your nuts hanging halfway down in them, doesn't do much for me. But move those nuts down to the bottom of your increased sac, and now you have something. Stretching skin doesn't affect the spermatic cord, which is why your nuts won't move down just because you stretched out your sac.
Here is what I have been doing, and I hope some of you try it and report back whether you see gains or not.
I started off doing 50 upward and 50 downward stretches. I am now doing 100 in each direction. Regardless, we are not talking about much time here, and I do them at the start of my regular jelqing sessions. Within a few weeks I saw a dramatic improvement in how my scrotum hung, and it hangs like that now most of the time. Not just for a few hours after I finish stretching them.
Most important: I stretch to my testicles, I do not slide my fingers over them. For the upward stroke I start with a grip similar to the ok grip. My thumb is between my stomach and my penis, and my other fingers are below and on the underside of my scrotum. On my upward stroke my fingers push against the sac from the underside, and my thumb pushes my penis into the sac from above. Your testicles will immediately be pushed to the bottom of your scrotum, and as you slide your fingers up, they really do look like they want to burst. However, there is absolutely no discomfort, and you stop your stroke when your fingers have pushed your testicles up as far as they will go. Unlike a jelq which requires you to have a fairly firm grip around your shaft to keep the blood you are pushing ahead of your grip and not escaping, you don't have that concern when stretching your sac. I curl my fingers around the sides of my nuts to keep them from flattening out or trying to wrap around my shaft, but my main concern is tightly sliding my fingers up the sac until my nuts are pushed as far as they can go. As a clear visual, I am trying to push my balls up until they are even with the tip of my pecker.
The downward stroke is similar with your thumb again on the topside of your shaft and your other fingers below and on the underside of your sac. You are basically using an underhand ok grip, and your penis is pointed toward the floor.