First off, I am VERY PROUD to say that this desire to inject was brought about BY those in #otherdrugs - and he is not the first to be enlightened as to the ways of IV drug use! God damnit, he certinly wont be the last!
Anyway, there really isn't much you can do to seperate the crap from the good stuff.. you can reduce the risk by only buying a solid rock, and it should be SOLID as a child molesters member at a day care - if it breaks in your fingers it's re-rock - STILL, re-rock is usually made by people who use harmless shit for a cut, as they have made it their business to cut coke... the danger comes when Tommy Suburb Thug wants to get himself an extra line so he cuts it with the first white powder he comes across..
You can also use ice cold water, as *many* of the most popular cuts are not soulable in cold water - as I said, MOST are not, MANY are..
Use a moderate sized bump - it is harder to overdose off cocaine then you think, you run a bigger chance of having your HEART EXPLODE then you do falling to the ground as you foam at the mouth and convulse.. add a good 50u-70u saline solution (or distilled water - anything but tap!) .. mix, and you shoudln't need any heat for cocaine - drop in your filter, because you ALWAYS FILTER, draw up your soup and blast yourself into oblivian.. carefull, I, like 97% of men, didn't "get" cocaine.. I certinly didn't think it was worth spending money on.. crack was only moderatly better, and I was smoking some *GOOD* ass Martin Luther King Jr Blvd ghetto crack.. but when I blasted cocaine.. dear god, lets just say that whe we had our shooters parties, 4 people would kill a box of 100 syringes by the end of the night, well, by morning.. we could EASILY finish a half ounce of rock-solid powder, and somehow it was never enough..
Also, one of the greatest pleasures you can have is to shoot up a few seconds before you orgasam, which can be a little hard to do, but I found this to be the best way:
You can start off having sex like normal, it's best with her on top because, well, thats less your you have to do! Have the rig ready to go, and as you get close, switch so you're sitting up and she is facing you with her legs around you, now kinda put yer arms around her like you're hugging her, look over her shoulder and hit your wrist.. timing is tricky on this one, but when you get it, you will question your existance.. you will also never wanna have sex again unless you have coke! Which isn't hard, because if you have cocaine, you have the ladies, and well, ya don't *give* it away!
------------------
PAK CHOOIE UNF! Do not trust the pusher robot, he is malfunctioning, we are here to protect you..