No (real) Harm Done.

(Massive trigger warning. There is blood, blades and blackmail.)

I want a dom to record me cutting, instruct me on where and how much pressure to put. Then they'd tell me how pretty I am all cut up and bloody.

When they have the blade, they'd slice me open slow, savoring my heavy breathing and whimpers. All the while praising me for how good I'm being, how pretty I am writhing at their hands, how good of a puppy I am for them.

They'd record everything to both watch later and to hold over me. When I'm a brat they'd say "Do you want everyone to know how you really are? A good little slut doing everything I tell you to, so obedient?" While groping at the previous wounds they've made on me. They'd absent mindedly rub over my scars gently when they're feeling particularly posessive.

They'd help me clean my wounds and give me bubble baths as aftercare. During sex, They'd grip at the scars, giving me more of a sting, and slap them at brattiness.