This is caused by "fibrosis" or excessive collagen build up, relative to the other side and not really "excessive" per se, and can be tackled in many ways. You can simply stress the left side more until it "catches up" to the right side. You can also apply a cool rag or something to the right side while you work out, or apply more heat to the left side while you work out. (thereby manipulating which collagen is more stressed or "stretched" with temperature) Generally speaking though, stretching or [words=https://shop.mattersofsize.com/products/sizegenetics-penis-extender]traction[/words] will even this out in the long term as [words=https://shop.mattersofsize.com/products/sizegenetics-penis-extender]traction[/words] is very effective in treating pyrones as well.
Tom
P.S. collagen fibers, actually new groups of cells or helixes, will align to the force used in [words=https://shop.mattersofsize.com/products/sizegenetics-penis-extender]traction[/words] over time...