I question the "how you hang it" theory.
The penis continues to change and grow through puberty and young adulthood (for a small percentage, some keep "maturing" until age 25 or so).
I knew one guy from high school whom I met a reunion. He was 5'4", graduating from High School. When I met him in his thirties, he was 6'3". i didn't believe it was him when we met again... Then he told me, he didn't start his adult growth spirt until age 22....
he's straight, but we were drinkin a bit. I asked, "So what about down there?" (Pointing to his crotch)
"A full 8 inches," said he. "Yeh, teh, yeh. Aren't we all?" asked I. With that he whipped out a hell of a nice piece of meat. I offered to suck, but he declined, citing sexuality issues. LOL.
I asked when did IT stop growing. He said around 24 or 25. At 19, he had only abou 5.5 inches.
So.... all this to say, I believe when you finish your growth process, the curve or bend is either there or not... probably more to do with genetics, than "how you stuff it."