Oh, I’ve seen that. It’s fascinating. There’s a ball with outer clamps and varying degrees of weights you can add on a dangly bit. You attach the contraption for some number of increasing minutes per day, and it stretches the skin surrounding the glans until it’s long enough to encompass the glans. After a while, the little ball will be encompassed by the new foreskin.

He says it’s not painful and I believe him, but not being the owner of a penis, it looks at least uncomfortable to me. Then again, I’ve never used gauges, either, and as you said, it’s pretty similar to that.