Afterwards, they both lay on their backs in her bed, breath slowly becoming regular again. Her hair is a mess and he's got sweat on his forehead and red marks down his back from where she clutched him so tightly he thought he might bleed.

They both turn at the same time and just stare at each other and giggle a bit, because the whole situation is ridiculous yet wonderful and brilliant all at the same time. She starts to sit up a little bit, pulling the covers up with her, and reaches into the draw, pulling out a box of cigarettes and a pink lighter.

Before he can even comprehend the situation, she's blowing smoke rings up in the air and holding the packet out to him.

"What?!" he asks, startled

"I said do you want a fag?" she says, rolling her eyes slightly.

"And since when do you even smoke, Rose Tyler?" he asks, raising an eyebrow

"Since I was about fifteen, but don't tell my mother that part," she says, taking a drag "but I don't do it that much these days, only after… these kinds of altercations."

"Oh so you only inhale a stick of cancer after shag is that it?" he asks sitting up more

"Yes I do as it happens," she says "now do you want one?"

He shifts uncomfortably, before taking a cigarette out of the packet cautiously, and twisting it about in his fingers. Rose just rolls her eyes and flics the lighter up, lighting the cigarette. "Have you never had a cigarette before?" she asks with a laugh, flicking hers in an ashtray on the dressing table, before picking it up and moving it between them.

"I think I tried it about, six hundred years ago maybe? I don't remember it much." He says, wafting it about in his hand.

"Well try it, you might like it." She says, leaning her head back on the headboard, blowing smoke above her.

"Fine, fine" he sighs because she has won him over, yet again. He takes the cigarette and puts it between his lips, inhaling quickly. Too quickly, because suddenly he's coughing like crazy and Rose is laughing at him. "Go slower doctor, like this," she says, demonstrating with her cigarette, that has nearly burnt out and blowing rings in the air.

So he tries it and this time, it doesn't seem so bad and he seems to kind of get the hang of it. It doesn't actually feel that bad. The rush of the fumes flowing into his sinuses doesn't actually sting as much as it did the first time. He tries to blow rings like Rose does, but they come out slightly misshapen.

"Nearly got it," she says, chucking the reminants of hers into the ashtray

"I might have to try this more often," he says chuckling before stumping the cigarette out, and grabbing the ashtray, putting it down on the floor.

"Alright then," she says "but we'll still have to follow my rules."

"And what are they?" The Doctor asks

"I only smoke after sex."

I don't even know. I wasn't going to continue this he knows thing after Happy New Year, but for like the past week I've just had the idea in my head that Rose would totally smoke and it just developed until I had to write it down.