Every once and awhile me and my husband will be right in the middle of something awesome. And the next thing I know he's yelling, "Ow! Butt cramp". We have to stop and then I have to watch him hobble around the house for the next week.

Ahh, to be in love!

Yeah, the worst I've had is leg cramps. They SUCK though.

I have a good one. I broke his nose!! It happened with my ex about 3 years ago. He was behind me, I whipped my head back pretty quickly (I usually did, so this should not have been a surprise) and for some reason he had his face really low. My head slammed into his nose. Blood was everywhere. I had a headache. We told the ER physician he got hit in the face with a basketball....
It still is hilarious to this day.

Leg cramps, rug/sheet/floor/wall burn on knees... one time I accidentally ripped out my partner's navel piercing with my nipple piercing. Hurt like hell for me, but my nipple looked fine and bloodless, whereas his navel ring yanked out and flew across the room. I decided then that I have nipples of steel.

my worst has been rug burn, but it was a really extensive burn! Took a couple of weeks to completely go away....

Not a sex injury...a sex TOY injury. I hoisted one of my sex-toy boxes up to put it on a shelf, and a piece of the wicker gouged a huge chunk out of the pad of my middle finger.

Which is my masturbating finger! Damn!

My left hip gets a cramp in it from missionary depending on the angle and how I have my legs. Besides that though nothing has really happened to me. My husband on the other hand has actually fractured his penis during sex. I have only heard of it happening while the woman is on top and leans back really far. He did it in missionary from ramming his dick into my pubic bone (he has a bad aim when he gets excited ) He insisted he would be fine and didn't need to go to the ER, so went to the walk-in clinic the next morning. They said it wasn't that bad and he'd be fine, just to let it heal. We should have went to a specialist though, as he went from having a refractory period of 2-5 minutes to about 3-4 hours. His dick will make a popping sound on occasion if he gets too rough with it, though it doesn't hurt him and he insists there is no need to stop when it happens. I do blame the quack of a doctor for not doing anything about it. He had went to a urologist after that, but the Dr. just said that it had already healed and it was too late to do anything about it I guess I should be thankful that he didn't completely destroy the tissue, and that he can still get an erection.

I am actually still recovering from an injury. I was at a kinky BDSM event and I ended up spraining my right shoulder. It was no ones fault but I guess I was getting overly excited and pulled to hard on my restraint.

Even with the injury the scene was really hot and it was worth the whole trip.

Like Bulma, my left hip will cramp up depending on the position. During a few sessions of me being handcuffed, I ended up with a bruise around both wrists...that was hard to hide at work...haha!

I've definitely had my share. When i was younger and just experimenting with BDSM and in a sub role, i had my wrists bound with many layers of duct tape that I managed to rip and break out of. (public service announcement: Do NOT use duct tape in bondage for this reason) I had to go to the doctor because my wrists were all black and blue and swollen to twice their size. just a bad sprain though. got strange looks on that one. told him we were overtired and playing harry Houdini- yeah right.

mostly now i get hip problems. I have a syndrome called type III ehlers danlos which is a collagen/ligament problem which basically leaves me too flexible for my own good. the worst thing that happens to me recently as a result is having trouble dislocating my right hip at inopportune moments. if i didn't have EDS that would be an overnight hospital trip, but as it is with my abnormal ligaments, i just have to pop it back in, but it sure can ruin the mood!

and yikes bulma! you made me cross my legs for him! glad he's okay!

Cramps and rug burns seem to be the norm. A broken nose wow. I have always heard stories of guys breaking their dicks and I know my husband is deathly afraid of that happening. Every time he slips out and then thrust hard or if I bend it the wrong way he gasps. We also have to watch his right shoulder because it is easy to dislocate from years of playing hockey. We haven't had anything like that happen yet but Oh I am waiting for the day!

i have never been hurt but my Master told me of a time He was at a play party years ago and an inexperienced Dom was unfastening a sub from an X frame - instead of releasing her legs first he released her hands and she keeled over breaking her nose and spraining an ankle......

A few months ago M and I were having sex, and he accidently hit my lymph node with his thumb. I didn't think anything of it at the time because it didn't hurt--but man, did it ever swell up!

Needless to say, we're much more careful now. I wasn't aware my nodes were so sensitive, lol.

I ended up in the ER with this mind blowing death headache that lasted for 5 days (actually, 3 different ERs). But I don't know if that counts