I can honestly say I began at 14 when I found pe, I was 4” in length by 4” in girth at the base and very very over weight. I pe’d for years off and on performing routines that would just about kill me if they didn’t create an injury. Sometimes I blew of homework all together just to work on myself longer and therefore fry my erections for a few days. Nothing says injury like squirting blood! By the time I left or the navy at 19 I was slim with 8” by 6” and felt better.
To be quite fair the grass was not much greener though. Sure I could satisfy a women better but that meant nothing because at the time I couldn’t get any woman. Then even later I found out that all you really need is 5-7’ in length on average, atleast 4.5’ in girth, and enough stamina to last 30 minutes atleast. Oh, and cunnilingus skills don’t hurt either.