True story when I used to snort lots of heroin one side effect was that your bowels, and bladder don't function right. I would just stand in front of the toilet having to piss like a racehorse but nothing. It felt like my Weiner was going to pop all day man terrible sensation.
I didn't know what a rk was then, but when I quit trying to push the urine forcefully instead focused on complete relaxation is when it trickled out. I got so exited that I accidentally kegeled shutting off flow, but I had found the key lulz.
Another time I had about an hour window to do a piss test so I had been clenching my bladder for a long time which left my PC so tense that I couldn't pee either. no drugs this time I just drank more liquid while I tried to relax which took me like another half hour.