Based on a story prompt in /r/rational what I think would happen if Harry tried to rationally guide his friends out of their imposed cultural values and into happier and more optimal polyamorous relationships.

If you have any suggested pairings or advice for how he should handle this situation feel free to say so in reviews.

The Circle. Day 0.

Harry flicked his wrist, sending the rock skipping across the lake, the setting sun sending a dim red glow over the water that was beautiful to the eye and hand. He then picked up his half empty bottle of butterbeer, chugged down another mouthful, and spoke. "I just don't know what to do with Ginny and Cho. Two fine women, both after my heart. Who should I go for though? The red haired devil or the Asian goddess. What do you think Ron?"

Ron glared at him incredulously and tossed a rock at Harry. He dodged it and scuttled back away from the violent redhaired wizard who was the brother of Ginny.

"Hey! What was that for!"

"You know what."

"I was just kidding. You know it wouldn't matter anyway. I can only have one woman." Harry said in a sad tone.

Ron looked at Harry suspiciously for a few seconds then nodded and sat back.

"I guess I know what you mean though. Ginny and Cho both flirt with you. That's hard for a man. I trust you won't break my trust though. Maybe I'll say yes when she's older. She's still just a little girl, my sister. Maybe when she's thirty. "

Harry grinned. "Yeah yeah. How's romance in your end."

Ron pressed his hand to his head, fuzzing up his red hair. "This can't go out of The Circle." They had these meetings a lot, away from all the others. Their little circle where anything could be said. Harry wasn't going to betray Ron's trust.

Harry shook his head. "No man. Mages before babes." Ron nodded. "I have the same sort of issue you have. Lavender is really coming onto me a lot. She's seen me teaching and she likes it. She asks for me to guide her and to-" he dropped his voice down into a high pitched falsetto. "run your strong Weasley hands over my shoulders and guide me, I just can't get the motions" Ron returned his voice to normal. "I can read the signs. But Hermione... she's pretty fine too. What should I do?"

Harry sighed and flicked another stone over the lake. Halfway across a Merman jumped over the stone, sending a massive wave through the blue red water.

"You know what I wish for?"

"I know what I'm wishing for." Ron waved a little Chudley Cannon's flag. His favourite Quidditch team which never won.

"I'm sure they'll win next time." Harry lied, patting Ron's shoulder. "Anyway, what I wish is that we didn't have to choose."

Ron looked down at Harry's groin and quickly interrupted. "You running out of potency? Too tired to do anything? Because I know a potion..."

This time Harry was the one throwing a rock. Ron laughed and scrabbled backwards onto the wet dirt, battling the rock away with a backhanded slap.

Harry frowned at Ron, half a smile on his face. "Not cool, not cool at all." Ron flicked a muddy hand at Harry and spoke. "My revenge is complete, and my sister's honor is restored."

Harry sighed. "Yes, you are surely a role model to all Weasleys. Anyways." He glared at Ron. "I meant that I wish we could have both. Why choose when you can be with both? Everyone would be happier if they could just be with more people. No more need to choose."

Ron spoke slowly, as though he was speaking to a child. "Because that's wrong as you'd be cheating. Relationship 101 for you," He poked Harry, "don't do it with two."

Harry opened his hands. "Not if they both agreed. If all three of us agreed to it why say no to more love?"

Ron shook his head again. "It wouldn't work. Jealousy would stop it. People just aren't built for it. That's why it's wrong."

Harry spoke. "Jealousy is an emotion. You can overcome emotions. What if you really worked hard to make it work?"

Ron frowned. "It wouldn't work better if you worked harder. If you worked harder that'd just be more stress and that'd break it apart. It's just wrong, ok?"

Harry spoke again. "Maybe with more people you could handle stress better. You could all support each other."

Ron rubbed his hands together, fidgeting a lot "But what if you lost a person? Then the stress would be even worse. Plus handling more people is more stress."

Harry put his hands up. "Hold a second. You sound like you're just arguing because you can. Remember the book?"

Ron nodded. They'd found a mysterious book called the Sequences in the library. It had a lot of good advice on how to think better.

"Remember what he said about the invisible Dragon?" Harry continued, putting on a high pitched nasally tone of grandeur, crawling up to Ron and speaking in his ear. "Is there really an invisible dragon in your tower?"

Ron half heartedly pushed Harry away, embarrassment red on his face, and spoke, his voice slurring into a deep tone in his best impression of a stupid person.

"No of course not, I know because he's invisible and I can't see it."

Harry spoke, his voice even higher in tone "Then why can't I touch the invisible dragon?"

Ron sighed and spoke again, continuing to speak in the same tone. "Cause he's intangible durr." He spoke in his normal voice again "I guess I was just making up reasons against a three person relationship. Anything you said I'd have some quick answer to why my 'dragon' had to be real. But..."

Harry spoke. "Remember the truest strength of a rationalist."

Ron spoke. "Saying what makes you wrong and predicting what will happen, not what you believe." He sighed. "Ok, I predict that multiple relationships per person will lead to unhappiness, and if I am wrong it will lead to happiness."

Harry clapped his hand to Ron's. "Then let's do an experiment. You and me. We can do a controlled test with Dumbledore's army."

They were currently doing tutoring in defensive magics for a large group of students. With Dolores Umbridge, the ministry's attack dog, in command of the school they were not being taught any defensive magic by the school- the ministry feared wizards who could defend themselves.

Ron nodded. "So make everyone be in love with everyone? I guess we could dose the pumpkin juice with love potions. It'd make for an unforgettable session."

Harry shook his head, and, half a smile on his face, jerked away and made a symbol of the cross against Ron. Ron reared back and hissed at him, baring his fangs.

"I vant you to dvink my pvumkin juice." Ron said, doing his best impression of a vampire. Harry grinned at him and spoke again.

"No, no, no rapey times with pumpkin juice. I just want to present the option to people. How about if I go in front and try to get volunteers who have some sort of problem in their relationships, like us, and see if they want to open up a bit?"

Ron frowned and stroked his chin. "This sounds incredibly unethical." He shrugged and pulled Harry's hand to his chest and patted his heart twice. "The circle has spoken." Harry tapped his wand against Ron's, both of them glowing a gentle red and spoke. "The circle has spoken! Let's do it."

Day 1. Room of Requirement, DA meeting. 6pm.

The two of them stood in front of all the eager students who were awaiting advice and training from the experienced wizards.

Harry spoke, his cloak and robe billowing in the summoned wind, his wand sparking with magic. "Dark forces besiege us. Voldemort is risen, the pink spectre of the feline haunts Hogwarts. But we have found a way to stop it." Ron stepped forward, sparks of magic trailing off his wand as Harry stepped back and dropped his wand down to let Ron speak. "An ancient weapon and magic, used by the Spartans to make an unstoppable army." Harry stepped forward again and they pressed their wands to each other, simultaneously summoning a torrent of light and sparks, and both spoke simultaneously. "The magic of openness. Who is with us?"