Summary: Lucy should explain things before she makes certain requests…..otherwise Natsu is just going to get the wrong end of the stick.

Pairings: Natsu/Lucy and a slight mention of Gray/Juvia.

Author's Note: Formaidenoftheluminousrapture, who made the suggestion and I really couldn't say no…

Kissing Natsu was the best thing in the world.

They were in the early stages of this new element of their relationship and every single thing was exciting. Every kiss, every touch, sent a small jolt of thrill down her spine and through her very being. She hoped that part never stopped.

"Natsu," she moaned as he pulled her lower lips between his and sucked. "Oh!" she gasped, he released her lips entirely and began to press fiery kisses across her cheek, along her jaw, and down her neck, suckling on little bits of pale skin. "Natsu!" she moaned again.

And then a thought hit her.

A naughty, exciting, thought. And without a second one, she pulled Natsu by the hair to face her. Her hand combing through his thick locks before she dragged her fingers against his strong jaw and brushed them against his lovely, burning, lips. "Natsu," Lucy purred, "Talk dirty to me."

"Erm….okay," Natsu blinked dumbly. He then met Lucy's eye and gave her a solemn, serious, and incredibly intense, look that sent shivers down her spine, opened his mouth and said, in a slightly husky (if still confused) tone;

"Filth."

Lucy blinked at that. Did he just say…..?

"Dirt," Natsu continued, "dust, mud, mud-wrestling, blood, gore, pus," his voice was growing more and more confident at each word, "the weird fungus growing in the corner of my house, Happy's rotting fish, Gray's mouldy underwear, the scum under the toilet seats in the men's bathroom at the guild, the weird green fuzzy mould growing – why are you laughing at me?!"

Lucy couldn't help it.

She really couldn't.

He sounded so eager and pleased about all these disgusting things that she couldn't help but snort a little, and then that snort turned into a giggle, and now she was laughing a fully-blown cackle as she rolled from side to side trying to smother her hysterical giggles.

"Sorry, sorry," she choked on her laughter, "it's just….it's just…."

"Just what?" Natsu snarled impatiently.

He looked really indignant and she couldn't blame him, he had been trying to please her and she had just literally laughed in his face.

"Natsu!" she gasped between giggles. "That's not what talking dirty means."

"Then what does it mean?!" Natsu asked frustrated. "What else could dirty mean other than….well dirty things?"

"Dirty things," Lucy quipped.

Natsu shot her a furious look.

"A different kind of dirty things," Lucy explained gently, "no one gets turned on by the thought of Gray's mouldy underwear and the scum in your bathroom. Not unless they have some serious problems." Lucy was pretty sure she heard Natsu mutter Juvia's name and decided to ignore the slight on one of her closest friends (and not just because it was probably true, anything about Gray excited Juvia). "Never mind," she said as she stroked Natsu's arm soothingly, "how about I'll just show you what I meant when I said talk dirty."

Natsu's eyes lit up and he nodded cheerfully. "You know best, Luce," he encouraged her.

Lucy smirked as she wrapped her arms round Natsu's neck and brought him close. His disappointed look when she bypassed his lips to whisper into his ear was amusing but as Lucy began to detail one of her favourite fantasies, the expression on his face became so much more entertaining….

In the end it was agreed from now on Lucy will be the one doing the dirty talk in their relationship.