seeing as how you're dealing with an amphetamine, that's how it's going to start. enjoy it while it lasts, because the longer you use blow it'll get to the point where you won't even be able to keep an erection. so i dont know man, lay off the blow for a while, jesus.
Pretty soon it's going to be 3 or 4 lines to cum, then 4 or 5, then 5 or 6. Pretty soon you wont even want to cum, you'll just want more coke. Stop now before it gets worse, no matter how hard it is to quit, it wont ever get any easier than it is right now.
Yep cocaine will shrink your dick and make it go limp after about a year of a lot of use. Yep it's true beotch so tri weed or somthing it won't do that. Limp dick!
Your body is responding normally. Try cutting back on the cocaine for a few weeks and see if that improves your ability to have an orgasm i.e. to come. Good luck!
*Falls from chair and laughs*