Jelqing shouldn’t be that hard of a grip.
How I’ve heard some people on here describe the pressure they apply with their grips:
-As tight as your grip when masturbate
-Just as tight as you would jelq an egg without breaking it
-Like squeezing the last bit of toothpaste from a near empty bottle
I know that the instructional PE site I first visited had a video of jelqing on the tutorial page and the guy was obviously super advanced because he looked like he was trying to rip it clean off. So.don’t do that.
I was thinking about a universal way to tell people how hard to squeeze earlier. As for your three:
1. People masturbate at different tightness’s
2. Egg shells are of wide range of different thicknesses
3. I assume you mean tube.. the last bit of toothpaste is variable between people and thus squeezing would be different.
There must be some object in everyone’s house that can gauge various levels of your grip relatively accurately. I say various levels because I believe it would be beneficial to have various levels of pressure depending on exercise.
Size is little more than a controllable perception without an accurate means of measurement.