I find it impossible to feel a stretch in my tunica, I tried tunica tugs, I tried bundled stretches and also A-stretches. I feel something, it's hard to describe, but I have the feeling that a nice stretch should feel different and I could do more
My penis seems to be pretty elastic. Maybe that is a hint for only 1 tunica layer?
I have increased my penis size by 0,4" in 2 months AFTER my newbie gains with manual exercises. The girth feels bigger but the measurements were the same than before.