12yo male reliv worried his penis is small says only seven inches erect wants to know if it will grow larger?

according to him ejaculating since elevel-im closer to five and from my generation that was average-if he considers seven small cus his friends are larger-something has changed-and im sure its the additives and crap in our processed food unless its evolution-if you looked at this kid dressed,i'm not atroll,you would think he was seventeen-been on many websites lately -most say that the average teen age boy is 6.5-not in my day-i dveloped late-around 15-and did have penis envy and talked to my doctor about it-said dont worry-isnt there evidence that this generation is larger?