One Saturday morning I dragged myself out of bed to make the trip with AuntPharm to the Brooklyn IKEA. As we navigated the maze of trendy swedish imports with his friend Decibella, (who at various points would bellow “I think I like this... GAAAAYS!! OPINION!!”) we began discussing dating.

“So,” AuntPharm told me, “now suddenly EverybodyLovesAden isn’t talking to me.”

“Why?”

“Because I went on one date with this guy that he’d been on a couple dates with. But I asked him first if it was ok!”

“And what did he say?”

“Well, he didn’t seem to mind too much... at first...”

“Clearly,” I dead-panned, “he minds.”

“I know,” said AuntPharm. “It's totally taboo to date your friends' exes.”

I was immediately resistant. “Why?!”

“Be-CUASE!” Decibella boomed, “It’s your EX!!”

“Thanks, that clears it right up,” I sarcastically quipped. She threw a sofa cushion at my head.

“Well,” asked AuntPharm, “Would you want someone dating XJosh?”

“Someone is,” I replied.

“I mean a friend of yours.”

I paused for a second to consider. Then I said, “but that’s totally different. He and I dated for like 2 years. Aden only dated that kid for what - a month? Three, maybe four dates?”

“Exactly,” agreed AuntPharm, “that’s why I think it’s OK that I go on a date with him.”

I nodded. “It depends on the relationship.”

“Was that EVEN a RELATIONSHIP!?” cried Decibilla. Neither of us answered. “GAYS!!! OPINION!!!”

“It was not,” declared Aunt Pharm. But I kept pushing.

“Maybe the real question,” I said, “is What defines a relationship?”

That remained unanswered for the rest of the day, and I decided to do a little informal research.

A few days later, I was out on the town with some friends, and as we were in a cab hopping from bar to bar, I threw out the question. “When you’re dating someone, at what point is it considered a Relationship?”

“If you had unprotected sex, it's a relationship!”

We all laughed at the absurdity of MinnieSoda’s response.

“Guess that explains why you’ve had so many boyfriends!” I quipped.

“Shut up!” he cried. Then, “Ok, seriously... three dates. After you’ve gone on three dates with someone, that’s a relationship.”

That satisfied the rest of the cab-full, but seemed a little cut-and-dry for me.

A week later, the subject emerged again when I met up with J-Blo at Vlada.

“How’ve you been?” I asked as the server presented 2 Absolute Madras, J-Blo's drink of choice.

“Well, Bazooka and I broke up,” he replied.

“Aw, I’m sorry,” I said, and meant it - I knew that J-Blo really liked him.

“Yeah,” he said. The he looked me in the eye. “All I ask... is that you don’t sleep with him.”

“WHAT?! Why would I... I wasn’t going to... I would never...”

“I didn’t mind,” he continued, “when you slept with Shirley Temple.”

“Wooooah!” I exclaimed, suddenly so far on the defensive I didn’t even gulp my cocktail before rebutting. “First of all, I didn't just ‘sleep with him.’ That was a full-fledged Summer Fling. Gay Pride to Labor Day. That’s the closest I’ve been to a relationship since... well, never mind. And speaking of relationships, you and he were not exactly...”

“It was a relationship!” J-Blo exclaimed.

“It was a threesome,” I reminded him, “that turned into some kind of crazy thrupple, that then went on to...”

“To become a relationship.”

I sighed. And downed my drink. Clearly J-Blo had defined that relationship. And clearly friends' exes were off limits.

It shouldn't have come as a shock to me. It wasn’t even 2 months prior that I’d hooked up with a cute twink, who had recently broken up with another twink, my cute-trick-turned-friend Kenny. For some reason, I thought that Kenny either wouldn’t find out, or wouldn’t care that I’d slept with his ex. And for a while, he didn’t find out. Then one night at 3am the chiming of my iPhone woke me up. It was a text from Kenny. “You fucked my ex boyfriend!?! We’re very mad.”

My first thought was: who’s We? I almost replied, but made the wise decision to leave it unanswered. In the months that followed, Kenny never brought it up, so I assumed he’d let it go... but his feeling at the time was very clear.

I was almost ready to report back to AuntPharm with the results of my research, when I found myself out one night in a group with a rare manifestation: two gay brothers. Both were very smart, very charming, and very attractive. Of course, they were also very popular with all the gays, wherever we went. As the night of drinking went on, I couldn’t help but take the opportunity to question one, in between my flirting with him.

“So,” I asked, as innocently as possible, “do you two ever fight over guys?”

“Yeah, we occasionally cross with the same guys,” replied Tweddle Cute. “There’s a rule.”

Jackpot.

“The rule is, as long as one of us hasn't had sex with him, its ok. The other can... whatever. But if a guy has had sex with one of us, he's off limits to the other.”

I should have known. As in so many cases, it all came down to sex.

I told AuntPharm all my findings, ranging from three dates to wacky relationship to just sex.

“Overall,” I said, “You were right. Dating a friend’s ex is totally taboo.”

He nodded solemnly. Then he said, “Two gay brothers?”

“Mmm hmm.”

“Hot brothers?”

“Mmmm Hmmmmmm.”

“Just sex?”

“Just sex. If someone has sex with one, he’s totally off-limits to the other.”

“Wow,” mused AuntPharm. “Imagine if you had that rule - anyone you’d had sex with was off limits to all your friends. We’d all have to turn straight just to get laid.”