This is an odd story, and quite unbelievable, but bear with me
A long time ago, post- leaving uni but pre- getting anything like a proper job, I lived in a flat with a friend and his girlfriend. She was (and is) an artist, and quite an eccentric one at that. As such, she had taken to painting topless in the kitchen on roller skates and there were huge extremely graphic paintings of genitals lying around everywhere. This is not particularly relevant but does put the whole thing into context.

Anyway, she went through a period of wanting to paint nudes, and she asked me to be one of her subjects. Being young and quite fancying her, I was up for it. However, her boyfriend wanted to be around to stop any funny business. Fair enough.

So this meant me being in the kitchen naked with a lady painting me and her boyfriend (a friend of mine) basically just sitting around drinking beer and taking the piss out of the whole situation, as it was clearly quite absurd.

Being naked in front of other (clothed) people can be quite liberating, so I took the opportunity of doing something of a party trick. My penile banjo string at that time was exactly that: a string attaching my foreskin to my bellend. Being in a mischievous mood, I decided to make use of this for showing off purposes and managed to hang a set of keys from said aforementioned string, much to the delight of my friend and his missus. All non-sexual good fun. However, understandably it bloody hurt, and I realised that it was a stupid thing to do, though a great story to tell the grand kids.

Anyway, a week or so later, I was engaging in vigorous intercourse with a ladyfriend and suddenly discovered masses of blood between her legs. At first I thought she'd started her period mid-shag until I observed that I was in excruciating pain. Pulling out of her, I looked down to see the bloodied remains of what had once been my banjo string, but had now become a dangling flap of banjo gristle. Presumably, not helped by the hilarious keyring-cock-dangling acrobatics I'd recently engaged in, I had weakened and ultimately torn that sensitive part of my gentlemanhood.

It healed very quickly, didn't hurt for long, and has caused no lasting damage. Never knew what that bit of skin was for anyway :-/
(InflammableHound may be recorded for training porpoises, Sat 9 Mar 2013, 23:42, 3 replies)

I'm not sure "man damages frenulum" is really "quite unbelievable" given that it happens all the time.
There've already been at least two stories about it this week. Perhaps you typed "entirely unremarkable" and your autocorrect got carried away?
(comedy bully grrrr, Sun 10 Mar 2013, 11:24, closed)

The frenulum bit wasn't what I was talking about
...more the key-dangling and topless roller-painting. But maybe that's normal in your household.
(InflammableHound may be recorded for training porpoises, Sun 10 Mar 2013, 14:57, closed)

Mine took 'kin ages to heal
Every time I thought it would be good to go we went at it again and the blood started off again. The initial snap was the worst bit though and I had no problems knocking one out over her tits as long as I wasn't too vigorous.
While we're on the subject though, my mate broke his knob a few months ago and has just had one of these fitted. An AMS 700 Penile Prosthesis. Goolgle it and search for the images. Horrific.
(Wagane, Sun 10 Mar 2013, 19:20, closed)