This so-called theory is just the common jelq with added emphasis to your corona. The glans is the end of your pipe and will take the most abuse, during penetration it has to burrow through a sometimes dry and tight hole and during an erection it has to hold the entire appendage together and resist an explosion (A pepsi bottle in the freezer will blow its cap under temperature extremes).
The technique to getting optimal expansion of the glans is not to become too erect during the exercise. When you become to erect in the jelq/expansion process it is like the pepsi bottle in the freezer; your head will not pop off but your exercise will be futile because the pressure is too high for elasticity thresholds of the tissue. A soft penis with complete engorgement is a tool waiting to be exploited. Hang tough, hang long.
I was asking about your theory for our capacity for gains. And I don’t think many people have trouble expanding their glans, its keeping it in this expanded state that is the problem.
Starting size: 7"x5.25" bp
Current size: 7.25"x5.875" bp
Goal size: 8.75"x6" bp