"Aren't you jealous?" Franky asks curiously and Zoro looks up to see Robin and Nami watching with interest. It occurs to him that they're talking about Sanji. His gaze tracks over to the idiot cook who is currently flailing around like a noodle and fawning over the attentions of a barmaid, Zoro thinks that he can even see Sanji's nose dripping a little bit of blood. Idiot.
This isn't the first time that this has happened. In the many months that they've been together Sanji has often flirted with women like this, but like he promised in the beginning it's never more than that. In all honesty all Zoro ever needed on that was Sanji's word.
"No." He answers with a shrug. Anyway, surely Nami and Robin ought to know that, he's never jealous when Sanji acts like that with them.
"But you're together." Nami points out with a frown, as if she thinks Sanji is being unfaithful to her personally. The idea makes Zoro smirk in amusement.
"Yeah, that's why I'm not jealous." He reasons.
"But he's flirting with those girls!" Nami points out, waving her hand in Sanji's direction and sure enough Sanji is now flirting with two women at once. He always was good at multi-tasking.
"It's just flirting, it's not going anywhere and he knows it. It's just- look." Zoro sighs and gets up.
He crosses the space across the bar to where the cook is flirting, coming up behind him so Sanji can't see him. He makes enough noise with his swords and his boots that Sanji will know it's him and he won't get his shin shattered from a startled Sanji. Sanji starts to glance around at him, but before he can get close Zoro leans in and presses a kiss to the space between Sanji's neck and his jaw, a place that experience has taught him makes the cook weak in the knees.
"Hi, cook." He says quietly and Sanji makes this choked kind of sound and goes pink all over. The girls giggle and leave him, but Sanji doesn't notice, he turned his back on them to look at Zoro. He didn't even see the girls leave.
"What was that for? You're not usually so public." Sanji asks, his eyes wide and hopeful.
"Felt like it." Zoro answers with a shrug and heads back to their table with Sanji eagerly following him.
Nami is giving them a confused look but Robin and Franky look incredibly amused. They get it, even if Nami doesn't. It doesn't matter how much Sanji flirts with girls, he doesn't mean it and the bottom line of it is that Sanji is his unless Sanji tells him otherwise. Catching the cook like that and distracting him is half of the fun of it, it's just a whole new way to fluster the other man and there are few things Zoro enjoys more than getting under Sanji's skin.
He doesn't need words for what he has with Sanji, Sanji can't be captured in just one word so why should anything that he has with him be? He knows all he needs to, being with Sanji makes him happy and it makes Sanji happy too. He supposes that it's obvious to at least several of the crew from the way that they look at the two of them and the way that Nami and Franky were trying to protect their relationship. But it's fine, they're better than fine.
"I'm gonna head back to the ship. Later." He says, waving to the others and walking off. He doesn't even need to look around to know that Sanji is following him. After kissing him a little just then Zoro entirely intends to do it some more and Sanji is clearly hoping for it too.
