i just got some new sust to extend my cycle but im not too sure about it, the only way i can think of testing if its kool is if hurts after injections like my old sust. the only problem is that my ass and thighs are so used to sust that they dont hurt no more. So what im really asking is, is it my body thats used to the sust or just those muscles? if i shoot into a new site will i get that pain again?