After looking at herself in the mirror for a moment Claire closed the book. For a second she regretted her decision... was she really going to just change everyone like this. At least there weren't going to be any major changes to society, just to how humans made love.
First she noticed changes in the room around her. A poster for some anime on her wall changed to show the main character with cuts on her face. Then some sex toys she had laying around her house turned into what looked like torture devices, meant to crush and slice. She even noticed a part of her bed that had been stained with cum changed to be stained with blood.
Then her body changed. She grew slightly thinner and paler, liking from lose blood. She noticed her genitals fading away until her crotch was smooth like a doll's, creating an odd sensation beentween her legs. Then her arms began to develop large cuts, some more healed then others. And her chest began to develop large bruises inpling someone had punched her in that area.
As she moved her arm she felt a bit of pain. But to her shock she didn't mind the pain, the agonizing feeling of wounds covering her limbs felt like the afterglow of sex.