i used to pin my thigh and every time i could'nt walk for 5 days....i pinned ass already twice and its very easy...no pain at all

I feel you, bro. I always pin my quads because it gives me more control and I don't care if it hurts or not: I just want to be in a comfortable position and not stretching like a ballerina while I give myself an injection.

if you have to: divide the glute into 4 sections this will help get an idea where you should be pinning. then, like wontstop said, pin the upper outter quadrant.

Okay next time pin your glutes. Not that difficult. Pin outer upper portion 1 1/2 inch You feel absolutly nothing. Unless you hit your sciatic then your going to be in pain.