Check out the stretchmarks.
Definitely not natty.
Definitely not my experience, or my childhood/teenage friends.
We had stretch marks in HS in the 80's and no one was 'big' or on gear, we were actually very little guys. Just did bench & curls w/ sandweights.
Stretch Marks not equal gear, from my experiences anyways.
i agree though, dude pretty big/shaped in the pic.