I did it for like a year a long time back and it made a difference. People think I’m uncut based on my pics, but not in person. And I can masturbate by sliding what foreskin I have and it feels good.

Basically you keep a steady tugging pull on the foreskin with a device like the Mantor. That encourages the skin to grow over time. It can take many years to get it long enough to completely cover the glans, and some guys will never get there no matter what. But why not try?