Like most truly horrible and wonderful things in life, it started out as a joke.

Reid wasn't initially in on it, he walked into the bullpen to find JJ, Prentiss, and Garcia huddled together at Morgan's desk, giggling to themselves. Immediately, Morgan's advice from before they'd started dating echoed through Reid's head, "If you see a group of girls laughing amongst themselves, interrupt them. Immediately. There's nothing more dangerous than women if you let them gather in solitude."

"What are you guys up to?" Reid asked, sliding between JJ and Garcia. Morgan wasn't around; he'd gone down to records to get a document from their last case.

The girls went silent at once, something Reid knew even with limited female experience to be a warning sign. They exchanged glances, and then Prentiss spoke. "Do you remember our last case?"

"Better than you do," Reid said. He wasn't trying to be arrogant, it was a simple fact. In any case, the girls exchanged more looks.

"Well, then, smart guy," JJ said, "Do you remember where we found the killer?"

"Herbert Gilsman was working at a hormonal therapist's office as a clerk," Reid supplied, "Time, 3:32 p.m., address, 647 Thirden Avenue, his desk was on the third floor-"

"Yeah, we get it sweet cheeks, you're a genius," Garcia interrupted, grinning, "But today, my precious, I'm afraid high honors must go to me for brilliance."

"What are you talking about?" Reid asked.

"JJ got her hands on a packet from Gilsman's office," Prentiss said.

"A packet of what?" Reid asked.

"Estrogen," Prentiss said.

"The female sex hormone? I don't understand, why would you need that?" Reid asked. Here the girls all exchanged looks and giggled.

Prentiss cleared her throat. "Well, JJ read an article that said that taking synthetic estrogen would cause a woman's assets to become more… well…"

"Luscious," Garcia said.

"And I thought Will would like it," JJ blushed. "But it turns out Will's really against hormonal supplements unless they're necessary for health, so…"

"So, what are you going to do with it?" Reid asked. The looks women could exchange when they were trying to hide something.

"Hear me out," Garcia started, "I thought it would be funny see the effects of the female sex hormone on a male member of the team. A certain… very male member."

It took Reid approximately two seconds to make the connection.

"Oh, no," He said, "Absolutely not…"

"Come on…" Prentiss wheedled.

"I am not going to let you hormonally dope my boyfriend," Reid said. The girls all gazed back at him, their eyes wide and begging. He tried to stand his ground, crossing his arms over his chest, but he had to face it – Spencer Reid being firm on anything was like a bunny rabbit baring his teeth.

"Oh, Reid, it probably wouldn't even have an effect on him. Morgan's got more than enough testosterone to fill this packet in one fingernail. Please?" JJ waved the packet in front of his face.

"We'll just slip it in my chocobunny's coffee, he's not here, and I bet he won't even notice the difference," Garcia said.

"If he won't even notice the difference, then why do you want to do it in the first place – stop giving each other those looks!" Reid squeaked.

"Look, I know you're in love with him, but sometimes Morgan can be a bit…"

"Sexist?"JJ finished.

"And it would be so good to have him go off on another tirade about how women are so hard to deal with and he's so glad he switched to men – don't get me wrong, I think you two are an adorable couple. But think how great it would be if he's sitting there running of his delicious little mouth and we have something to hold over him, even if it's just mental," Garcia said.

"You do have a point…" Reid said. Even he was shocked at the sort of things Morgan could say with immunity because of his good looks.

"Reid, please," Emily got off of the desk to kneel at his feet. "If you let us do this, I'll pay you back – I'll do your paperwork for you, I'll buy you coffee for a month."

"It would have to be two months," Reid said.

"Deal."

"I don't know… I'm still not sure," Reid bit his lip uncertainly. Garcia got a predatory glint in her eye. She leaned forward and whispered something in Reid's ear. Reid's eyes lit up like he had just smelled fresh cookies. "Okay, do it."

Within two minutes Morgan was back up from the records room and only Reid was at his desk. His eyes lit up the way they only did when he saw Spencer. "Hey, Pretty Boy," He cooed, giving Reid a gentle peck on the lips as he settled down to his coffee. He took a drink and made a strange face, "Is there something in this?"

"Oh, uh, I don't know," Reid lied nervously, "They brought in some new beans the other day, maybe it was that."

"You're a terrible liar, baby boy," Morgan grinned at him and took another swig, pursing his lips in concentration. Reid might have been more nervous if the pursing of Morgan's full lips wasn't distracting him. "Oh, I know. You tried to get some of your sugar crap in here, didn't you?"

"Yes!" Reid said, leaping on the suggestion like a drowning man on driftwood, "I thought it would be funny. Can't fool you, can I?"

"No way, baby," Morgan laughed and took another drink, "Lucky for you, the coffee isn't ruined, or you'd be getting me another one right now. So, are we still on for tonight?"

Meanwhile, in Garcia's office, the girls were huddled, watching Morgan finish his tainted coffee with almost childish glee. "Oh my gosh, I can't believe we got Reid to go along with this!" JJ said. "Garcia, what did you say to him?"

"Nothing," Garcia said, "I just let him in on the well known fact that estrogen makes men's nipples larger and tenderer." She wiggled her eyebrows suggestively, causing the girls to break into fresh gales of laughter.

"Yeah, but it also decreases sex drive," Prentiss pointed out.

"So, they'll have sex three times a day instead of four," Garcia said dismissively, "I don't see the harm in it."

"Alright, I think this calls for a celebration," Prentiss said, "I recommend chocolate."

Of course, if the girls had known the consequences of their actions, they'd never have gone through with their little prank in the first place. But how could they have known something that Morgan barely thought about? How could Morgan have known that drinking that cup of coffee might cost him his life?

At any rate, no one knew what was going to happen until it was too late.