It might be like this Ass-Master at my gym, who claims to know all about gear, says. He says Arnold was , get this shit, on Gorilla Hormones since he was young, and thats why he has that boxy head look. This Asshole says if you see a guy with a boxy shape to his head, prolly 9 out of ten times his using Gorilla Hormones. He even claims to know someone who used to extract the hormones from the Gorillas. Maybe that could be the answer to your Que.! This Ass is so serious too, but I just let it go, because I don't know squat about anabolic androgenic steroids.