My drunk cousin (thankfully sober now, or he'd be dead) told me that he broke his dick when he was in the hospital going through the DT's after an operation and he tried to rip out his catheter. He doesn't remember doing it, but apparently doctors had to strap him down to stop him. And now he tells me that when he gets a boner, his dick is crooked, not curved like it used to be.
I did have the... err... fortune... to have a fuck-buddy who was quite tall and she definitely carried some weight with her. Luckily my penis seems to be resistant to most trauma because she bent me a couple times on accident and it didn't do anything other than scare the shit out of me momentarily. I can't imagine what the guy was doing with his girl to fuck up his dick so bad.