interesting.
I agree that with the differening environs, that the genetically identical twins would develope differently. Although I’m not sure to what extent - in twins that is.
Say if you live a very healthly lifestyle and get say 7”, how much would that be reduced if you were a couch potato? 6.75? 5.5?
To what lengths (pun) can we maximise a genetically predetermined path? (Without PE)
I personally had a fairly active lifestyle in late childhood, had a constant and forceful growth spurt (was closing in on 6’ even before high school) and I was at about 8” (pre-PE, naturally that is)
maybe my active and healthy lifestyle helped to start my growth earlier and therefore maximize my penile development to an extent? eg maximized my genetic potential…