I used to be bat shaped. When I started PE a little over 3 years ago, I was about 4.5” BEG. I don’t remember measuring it, but I know it was smaller than my 4.625” MEG.
Today my BEG is 5.25”, MEG is 5” when 100% EQ. (Currently on decon, prior to decon was solid 5”).
I gained most of my BEG over the last year and a half. I will never know if it was pumping as consistently as I could, or the 2-3 hours a day of BTC stretches made the gains.
I think it was more the BTC stretches. I’ve actually pulled some of the “inner” penis out. I can actually see and feel the difference between my base and the rest of my cock. It’s hard to explain. But, it’s real.
So, bottom line is yes, you can change your shape. But, as always everyone is different. Some exercises work for some. Other’s need to try another approach.