I can't recall what the thread is called, but if you do some searching you'll find a very helpful link that shows all injection sites on a sweet little body chart. It's on this forum somewhere, I used to have it saved in my phone. I'll see if I can track it down. Something I do is make sure I rotate my pinning sites every time with shirt ester cycles, if it's only 2 pins a week I prefer the butt cheek and just switch sides. Other than that I go shoulder/shoulder/butt/butt/quad/quad. That all the fluid isn't creating a little pocket or something? Works for me.

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Abs on a skinny dude is like boobs on a fat chick