A naked man lies face up on a bed, swaddled by a chocolate-colored puffy jacket. He's rubbing his butt all over it.

A woman enters, herself cloaked in a navy puffer. The hood is up like she's in Siberia but her legs are bare.

She sits on the bed.

"What are you doing to my puffy jacket?" she asks the man.

He looks sheepish.

"It's really soft."

"I know," she replies. "Mine's even softer."

Then they fuck. In their puffy jackets.

When the man comes, it gets all over the woman's jacket.

"Naughty boy!" she says. "Now how am I supposed to wear this out?"

… This was the porn I got off to this morning.

I did this not because I have any particular sexual interest in puffy jackets myself, but because I read that there's a growing number of people who do.

In fact, puffy jacket porn (or "puffa porn" as the British so British-ly call it) is one of the newest and fastest-growing smut categories on the Internet. Its fans even have their own cute-but-grammatically-incorrect name for themselves: puffys.

Yet while it's still a pretty niche thing to beat up your genitals to, puffy porn is gaining popularity thanks in part to sites like Reddit, which allows puffys around the world to share and ogle pictures of hot (literally and figuratively) girls in "sexy pink Moncler jackets" and the like. It's also a versatile fetish, lending itself easily to both vanilla and kinky fantasies, something which makes it one of the more accessible, inclusive new fantasies. While straight-edge puffys will delight in the simple suggestion of nude flesh beneath a silver 2001 Gap puffer, more hardcore kinksters can dabble in specialized puffer bondage on sites like Down Girlz.

Browsing Down Girlz, you'll be treated to countless videos of women getting railed in the sort of full-body ski suits your Aunt Terri wears to Vail. In one, a woman called Sybil "plays with her down prisoner," who's trussed up like a tender roasted chicken under layer upon layer of puff, play-struggling against the blisteringly hot embrace of a sleeping bag. He rolls helplessly on a nylon-sheeted bed, clearly intoxicated by the fluff. Mmm, sweaty.

In another, Sybil gets whipped and spanked in a gigantic North Face jacket … which, if you think about it, totally explains why college girls are always in that getup, amiright?

On its own, none of this innately turns me on, but what really did it for me was seeing how turned on the performers in the videos I watched were. Enthusiasm is always hot, but while I was enthused by their enthusiasm myself, I still wanted to know what about puffy jacket porn got them all hot and bothered.

A little jaunt around Google revealed that puffy jacket porn falls into the same category of paraphilias as latex or leather fetishes do; people like it because of the texture, the tactile sensation of it on their skin, and because it's usually tied to some eroticized childhood memory of theirs.

One Redditor, a 35-year-old from Manchester, England, told Broadly he used to have a red puffy body warmer when he was younger. "I liked the feel of the material against my body," Mark explained. "When I was around 11 a girl I knew asked me if she could wear it, and I thought, Wow, that looks so amazing."

Another 20-year-old Redditor, Ahmed, rationalized his pufferdom with an anecdote from his adolescence: "I think it has to do with me just liking the soft fabric and experimenting with it when I was in puberty — masturbating with a jacket. I noticed how it felt better than just my hand."

Other people love big ass down jackets because of the psychological payoff, rather than because of the feeling of having sex on puffy down. "Some men tell me they associate it with a preppy, college, L.L.Bean girl," says sex researcher Ian Kerner. "The coat is a sort of costume that reinforces a sexual fantasy: the good innocent girl getting naughty. Oftentimes the preference is associated with particular colors, such as white, red, or pink."

Browsing the Reddit puffy thread, there's plenty of evidence to support that theory: Alongside the "Moncler sluts" there are far more innocent posts showing smiling, approachable blondes in inoffensive pink gilets.

And just how prevalent is this preference for puff?

Down Girlz founder Ryan (last name not disclosed) told Broadly he thinks there are about 1,000 people in the puffy community.

"It's mostly European men," he said.

Makes sense; nowhere are puffy jackets more common than on the ski slopes of Switzer-Austria-France-Gland.

And for this small, yet cum-covered handful of men, the requirements for what'll turn them on are hilariously exacting.

"It has to be 100 percent nylon," Ryan said. "This is as much a nylon fetish as it is a jacket fetish." After shoots, Ryan even sells used jackets for a pretty penny to his minions. "I never wash them but I try to keep them clean," he explains. A thoughtful touch.

However, while having a puffy fetish is one of those essentially harmless, pretty innocent sexual behaviors, it's not always easy being a puffy.

"I do feel ashamed of this fetish," said Ahmed. "Mostly because it's rare."

"I would rather not have the fetish, as it can get in the way sometimes," said Mark.

Nevertheless, it's one of those easily includable fetishes that you could work into your sex life without anyone getting too traumatized.

Mark says he had one girlfriend who was willing to give it a go, and ended up being really turned on by it as well.

As I closed the web window that housed the porn I'd just subjected myself to, and confusingly reflected on what I'd just done, I kind of felt the same. It's not something I'd think of myself, but the fact that others are so aroused by it is pretty interesting, is it not? Human sexuality is a strange, strange thing, but I love that as a species, we're so capable of creatively turning ourselves on. We go so far beyond the realm of reproductive necessity when it comes to fetish and fantasy to sexualize completely non-sexual things that I can't wait to see what crazy thing people start jacking off to next.

Steel wool? The patch of air that sits above your dog's head? Crispy McChicken sandwiches? Oh wait, that one's already been done …

I'll leave you with this … please be good to it: