I have claw marks on my back, and here's the story of how I got them.

My former girlfriend was a cute little thing. 5'2, blonde hair, blue eyes, and big chested despite her small 130lb frame. I'm almost a foot taller at 6'1, with brown hair and blue eyes, and an athletic build.

We had great sex that often lasted whole mornings when classes started late. Passionate kissing turned to animal lust quickly - our bodies tangled in all sorts of positions. I particularly enjoyed when she was on top riding me so I could see her sexy body move, but I knew she loved being pounded hard and deep with me on top.

The first time it happened we had gone to visit her parents and were staying in the guest room. After a while of teasing each other and fucking, I rolled her over, spread her soft thighs and stretched her around my thick cock. She covered her mouth to stay quiet.

I was thrusting into her in long strokes, deep each time I entered her. She wrapped her manicured French tipped fingers around my sides and gripped me. Her grasp was exciting and I started giving her my cock harder and faster. She moaned, and her eyes went wide as she realized her parents were upstairs. So, I leaned forward and kissed her with lust. And I kept fucking her harder, knowing she was getting close to climax.

She moaned into my kisses, the sound muffled. And her fingernails started grabbing at my back, raking it in lines. The feeling of her digging her nails into me as she started to lose control was intense. It drove me wild and I lost myself in the intensity, needing to feel her orgasm as I pounded into her.

Her legs started shaking. She grabbed my back hard, and I could feel sharp pain as she raked her fingernails down it. Her orgasm tore through her, and I couldn't help but cum deep inside her tight pussy. And then she went limp... almost lifeless. I freaked out a bit and pushed up off of her asking if she was okay.

She had passed out, cold, from the intensity. When she came to, I relaxed and cuddled her. As we cooled down, I felt my back stinging. So when I got up to use the restroom I checked the mirror and saw she had made it bleed with her nails. After that, I thoroughly enjoyed when I was able to make her pass out from an orgasm... and since it happened many times I now have some scars from her nails on my back.