Thoughts on Base Girth

Some guys gain girth at the base from stretching or hanging, yet others don’t. The “baseball bat” pattern of growth is often reported, yet many PEers never experience it.

I wonder if the tissue surrounding the penis at the base - the “hole” it goes through as it exits the body - limits base girth gains for some guys. I haven’t seen any good illustrations of the anatomy in this area. But it makes sense that if the opening is narrow the base can’t expand.

Any thoughts on this? Has anyone heard of exercises to stretch out the opening?