My penis doesn’t work very well.
At 25, had a penile doppler scan. A nurse injected Caverject (vasodilator) into my penis. (yes, a needle in the side of your penis hurts. A lot.) Ten minutes later (when there was supposed to be a raging erection, but there wasn’t one), two doppler techs came in and used a probe sort of like an ultrasound unit to measure penile blood flow. The results were, um, sub-par.
That led to the pelvic arteriogram. after some mild sedation, they sliced into my femoral artery and inserted a catheter which they snaked upstream to some major abdomenal arterial junction. Then they injected Caverject into my penis, just like in the last procedure, only this time they used even more, making sure I developed a really serious boner (they left the needle in place the whole damn time to facilitate repeated doses). From the tip of the arterial catheter, they then released radio-opaque x-ray contrast agent, and immediately snapped a series of X-ray images; the contrast agent blocks the X-rays, and its progress through the arterial network reveals where and how large the relevant blood vessels (in this case, the ones feeding my penis) are.
The contrast agent feels like they’re lighting a fire inside you when they release it. They did this repeatedly. The needle they left in the side of my penis (and repeatedly fiddled with) turned my entire penis black and blue with bruising; seriously I took a picture of it, it was that spectactular. Lying down with a raging boner at the end of the procedure, I couldn’t pee, so they catheterized me (not the previously mentioned arterial catheter; now I’m talking about a urethral catheter). Except the doctor couldn’t get it past my prostate. Solution? Use a BIGGER one that won’t buckle when she pushes on it. It hurt going in and (later) coming out, and left my entire urethra inflamed and irritated. Any guy who has accidentally gotten soap in the end of his urethra knows it hurts like a mofo when you pee; try to imagine your entire urethra burning like that when you pee.
After it was all done, I was instructed to drink plenty of water to flush the contrast agent out of my system. Except something they had given me - the sedatives, the Caverject, or the contrast agent itself - had messed up my stomach. I couldn’t keep anything down for more than a few minutes. The procedure had started at 8 AM, and ended just after 1 PM; by 9 that night I had thrown up about a dozen times, so violently that I had been bursting blood vessels in my eyelids. I had to go back to the ER for anti-emetics and a saline IV just to get some hydration into my system.
At 30 I had a penile plethysmograph. You strap a monitoring unit to your thigh while you sleep, and this thing has two tiny cuffs that fit around your penis. Every few seconds the device gently contracts the cuffs, gauging penile rigidity to see if there’s an erection at that time. Turns out I get fantastic nighttime boners; I go to sleep, and my penis wakes up. I wake up, and my penis plays dead until bedtime. Seems my lack of daytime performance capability is all in my head somehow. Go figure. <shrug>