How to stretch and avoid injury?

Are you properly warming before stretches? How old are you?

I stretch under very warm water in shower. I am 50.

Okay. Back off on the grip and take it slower. Go at your own pace. Listen to your penis and proceed.

But if I do not grip it tightly enough, I cannot get a decent pull.

How do you grip?

I grab right below the glans and pull. I also grab the base and pull.

Maybe it is easier for you since you are circumcised. My skin keeps wanting to slide forward.

I am going to try pulling from the base to see how that works.