Zoro and Sanji's second time. The less said about the first...

Sanji doesn’t know how he didn’t notice it before, is the thing. Of all the times he has seen Zoro shirtless (in battle, mostly) he just… never noticed. The problem is, once he has noticed, Sanji can’t seem to stop noticing. And neither can anyone else. In which Zoro has a nipple piercing and Sanji has a Problem.

They’d arrived at the island of Mae to catch the end of a brutal, bloody conflict between the island natives and a band of thugs from further inland. After helpfully settling the conflict, the townspeople of Mae offer to throw the Strawhats an island-wide party complete with food, dancing, music and free credit at the best brothel their town has to offer. Wherein Sanji smokes a questionable substance prepared by a local devil-fruit user and gets a little bit hornier (and a little bit looser with his inhibitions) than he ever intended to be around a certain swordsman.

“So, we’re gonna play it like that, huh, Cook?” “Oh yeah. We’re gonna play it like that,” Sanji returns, despite having absolutely no fucking clue what Zoro could possibly mean by that. --- Or: The Great Game of Gay Chicken Aboard the Thousand Sunny

Three inches in front of Sanji's face, Zoro is wearing an expression that could wither stone. "What the fuck," the swordsman snarls, "do you think you’re doing." The remaining logical dregs of Sanji's brain recognize that he's just gotten himself into a pretty dicey situation. The rest of it apparently doesn't fucking care, though, because the absurd line of response he comes up with is to grin right in Zoro's supremely pissed-off face and say- "Well, what was your dumb ass doing?" In which the crew’s plastered, Zoro needs to blow off some steam, and Sanji gets taught a lesson or two.

Sanji will just go knock. Appease his own sense of responsibility, get yelled off, and come back to his own bed knowing he tried. It’s the least he owes the frustrating marimo, as crewmates; to at least make sure he’s got options.