radicalelle asked you:

I am going to start feeding you prompts and seeing what sticks: Knife play. It screams Zosan. I don't think any further explanation is needed.

He'd been bitten by some nasty insect motherfucker on some big jungle island, trying to put himself between the petrified cook and the bug as it happened and then got bitten for his trouble. He'd tried to yank the stinger out of the back of his shoulder but doing so had just caused more of the venom to pump into his system and then his legs had stopped working.

Sanji had dragged him back to the ship where Chopper was nowhere to be found and he'd really like that stinger removed now please and thank you. Sanji had quickly surmised that yanking it out wasn't an option, anything that squeezed the stinger shot more venom into his system and that really wasn't nice.

So he's shirtless and on his knees with his back to Sanji on the kitchen floor and at any other time this would be a great thing. Clearly not all of him has got the message because for some reason the sound of Sanji pulling a knife out of the knife block makes him half hard. It's just because it's a Sanji sound, that's all. Sense memories of Sanji in the kitchen is all.

"I'm going to hurt you, but you have to trust me." Sanji murmurs lowly and Zoro can just see the knife out of the corner of his eye. He nods.

He can feel the blade radiating cold onto his back and the damn thing hasn't touched him yet but his entire body breaks out into anticipatory goosebumps. Sanji's always been fantastic with a blade and damn if he hasn't thought about him with a blade before, but Sanji's never used them on him because of the danger of a fight. Only… only he's not fighting at all.

The blade kisses his skin and there's a second of resistance before the oh-so-sharp blade sinks through his skin like butter. The stroke is light, only running through skin and not hitting muscle at all. He keeps deadly still as a bead of blood runs down his spine, it makes sense, all of the blood inside his body is heading south too.

Sanji's blade curves cutting into his skin around the stinger and slitting him downwards more. Zoro whines in his throat. Sanji was meant to do this, born for it. Why the HELL has this never occurred to him before. It's not even the pain, it's the control, the absolute stillness required from him and the trust that Sanji has in him to do just that.

He's shuddering and gasping when the blade is taken away and Sanji's fingers replace the blade and holy god Sanji's fingers are inside him in a way that they've never been before and when he digs the stinger out from the inside and it's just Sanji there then he finally breaks and comes with a yelp.

"Did you just?" Sanji breathes in wonder. But Zoro can't answer, he's shaking, still high and they need to do this again sometime.