Like most of us, fashion designer Rachel Pally loves wearing her boyfriend's clothes. And while said boyfriend, Kevin Circosta -- a fellow designer -- thinks seeing his girlfriend in his T-shirts is sexy, discovering that she'd cut off his shirt collars wasn't, he says.

So, the two put their heads together and created Boyfriend/Girlfriend, a unisex line of clothing couples can share.

"You know, I love my jersey clothes, and I wear them most days," says Pally, who designs her own self-named line. "But I also love to wear Kevin's flannel shirts, and I like a beat-up old T-shirt. To be able to make our own and make them fit the way I want them to, we were like, 'Why don't we just do it ourselves?'"

The two L.A. natives are the epitome of meet cute: They first crossed paths in preschool. "She's literally from my block," says Kevin, "the most quintessential girl of my life." But the two didn't start dating till a coincidental run-in at Kinko's. "We actually reconnected after college when we were both making our first line sheets and flipbooks for our first brands," he says. "I saw her from across the room."

Both former hippies turned fashion designers, they couldn't believe all the coincidences. Now they're bringing all that togetherness to your closet in a collection of fitted flannels, vintage-washed plaid and soft cotton tees.

But there is a right way and a wrong way to wear the boyfriend look, they both say.

"I think women can look sloppy and unsexy in men's clothes," Pally cautions. "I think there's a way to do it where you can look really hot in your boyfriend's shirt, and I think there's a way you can look too utilitarian. I think if you're going to dress like a boy, you still have to dress like a girl. That might mean wearing bold jewelry or putting on a heel, or, if you're going to wear a flannel shirt and jean shorts, you've got to have a purse. Just make sure to stay feminine in your masculine style."

And be careful about getting two twin-ny with the look:


Although the Boyfriend/Girlfriend look book shows the two of them sporting a few fairly identical outfits, Kevin and Rachel admit it's hardly ever planned and just shows how similar their tastes are. "We do have a lot of overlap," Pally says. "When I go to work and he goes to work, we can be twins. But when we go out to dinner, we're not going to put the same flannel shirt or same big hat on."

Although they -- like so many couples -- admit they run the risk of being one of those dread twosomes who dress a bit too much alike.

"When you're together with somebody, you meld into that," says Circosta, "whether you have a clothing line together or not. You start sounding the same. It's like a union. And when it's done in such a way that's fun and not forced, then I think it's cool. I think it's natural."

Boyfriend/Girlfriend is currently sold at singer22.com.

See below for a gallery of scary dress-alike duos who really just shouldn't.