I have had the same problem since last year when I ran my first cycle.
One thing to make clear though, I'm taking an SSRI antidepressant, which, for a while, decreased my sex drive considerably.
Since my first cycle, which was Test/Deca/Dbol, I have not been able to ejaculate every time I have sex. If I'm lucky, we're talking about every other time, and that is WITHOUT a condom. If I'm using a condom, not a chance.
Anyone with a good solution will be rewarded, if I can bust nuts again on demand, I'll be happy guy.