Finn followed his grass double into the kitchen, completely ignoring the fact that Fern was trying to get away from him. Fern slumped down to have a seat at the kitchen table and Finn plopped down beside him.

"Come on. Just for a second?"

Fern put his face on the table, then covered his head with his arms.

"No, Finn. It's weird," he said, his voice muffled as he wasn't bothering to lift his head from the table.

Finn crossed his arms on the table next to him and laid his head down on top of them, looking at Fern through the gaps in the grass boy's own arms.

"Tell me how it's weird," he demanded, skeptically, "We're basically the same guy."

"It's just weird, dude! Get away from me!" Fern shouted, shoving Finn and getting up from the table to pace around the kitchen.

Finn and Fern had been going back and forth in this way for close to 10 minutes. Their argument traced back to the other day when Jake had suggested they see if Fern could fold his tongue (Finn was the only organic being they knew who couldn't do it). Not only had Fern been able to curl his tongue, but he could elongate it and change its shape into something snakelike. Since then, Finn had become obsessed with figuring out what other ways their bodies differed from one another.

"But, it's just us now. BMO's at soccer practice til 6 and Jake won't be back from Lady's for days. Nobody's gonna walk in on us."

"Do you hear yourself?!" Fern shouted incredulously, throwing his arms up in the air.

"What?" asked Finn, innocently.

"Walk in on us? You're making it sound even grosser than it already is!"

"It's not gross," Finn scolded, defensively, "It makes sense that I would wanna see it, Fern. We're curious by nature. You know this!"

The plant boy rolled his eyes.

"I don't care!" he exclaimed, completely fed up, "I don't care why you wanna see it, because I am not showing you my thing!"

Finn slid out of his seat and onto the floor, lying on his back underneath the kitchen table.

Fern sighed before getting on hands and knees to check on the other him.

"You really gotta let this go, man. It's not healthy," Fern consoled him, placing a hand on his shoulder.

"I can't, man. Not knowing is gonna bother me until the day I die," the blond teen replied solemnly.

"You sound like a real D-list right now, Finn. Let's get up from here. The floor is filthy," Fern said, making a face.

"I know, right?" Finn said grinning, quickly recovering from his dramatics, "I call not sweep the floor!" they both yelled quickly as they climbed out from under the table.

They both chuckled and pinched each other three times as they got to their feet. The first time for a laugh and the second to get the other one back for pinching them. Then, once more for another laugh.

"It's been dirty since before way before I got here. I can remember the last time Jake swept," Fern reasoned, still chuckling as he walked over to the corner to grab the broom and held it out to Finn.

"Fine," Finn said grudgingly, "I'll sweep... if you show me."

Fern pushed the broom into Finn's chest, annoyed.

"No," he said flatly before walking away, leaving Finn to his chore.

...

After Finn had finished sweeping, he went ahead and started on the dishes that had been piling up.

Was he being weirdly obsessive about this? He was sure Fern's thing was different from his. He could tell by the way the other boy acted when he asked. But why did it matter? Finn wiped off the last glass and put it away before drying his hands.

By the time he made it upstairs, his doppelganger was sprawled out on the purple couch, his feet hanging over the side. He was halfway asleep.

Finn sat down on the floor, cross-legged in front of him.

"Okay, dude. Hear me out one last time, then if you're not convinced, I swear I'll drop it."

Fern turned onto his side to face the back of the couch, turning his back to Finn.

"Are you seriously doing this right now? I'm trying to take a nap," he mumbled grumpily.

"Fern, I'm sorry for bugging you so much over the past few days. I know you think it's stupid, but this is actually really important to me. Just let me try to explain one more time, then I'll let you sleep and I won't bother you again."

When Fern turned around Finn was looking at him with puppy dog eyes. The plant boy had tons of memories of employing that exact look to get Jake to go on quests when his brother had decided he'd rather stay home and play BMO. It was weird to have it used against him like this. Then again, everything was weird now that there were two of them.

"Fine, Finn," Fern caved, "Five minutes. And if this is some kind of game and you're wasting my nap time, I'm gonna bop you one."

"I agree to those terms!" Finn said excitedly, adjusting himself and getting comfortable in preparation to make his case.

"Okay, so we're the same, you know? We both remember everything that's ever happened to us up to the point where you came outta Finn Sword."

"Sure," Fern conceded sounding bored.

What was Finn's point? They had deduced that much weeks ago.

"You know things about me that know one else knows, not even Jake, cause they're also things about you, right?"

Fern nodded, beginning to understand what Finn was getting at.

"So, both of us know every dumb, gross, embarrassing thing the other one has ever done. Everything we've ever seen or felt. We can talk to each other and know the other one's gonna understand, because he already experienced the exact same thing. Nobody else has somebody like that. Not twins, not clones, not even mirror peeps from other dimensions. Just you and me, Fern. It's kind of amazing."

Finn was looking up at him so intently the Fern had to look away.

"But, I guess, we're not really the same person anymore since you came outta Finn Sword," Finn continued, "You're green and you can do all this rad stuff and the new memories we make, we don't share them like the old ones. If we're gonna keep understanding each other better than anyone else, we have to tell each other everything from now on and not keep secrets. Otherwise, we're gonna lose this really cool and special thing we have and I don't wanna do that. I've really loved having someone who's even closer to me than a brother, and I don't want to grow apart and leave that behind."

Fern's face softened as he looked down at his other self. He grasped the human boy's shoulder.

"Finn... all of that was really sweet. I know you were speaking from the heart and I guessI feel the same way... but, you need to tell me the real reason or I'm gonna bop you one."

Finn groaned and wriggled out of Fern's grip.

"Okay! " he said frustrated at being called out so plainly, "Okay, fine, here goes. You have literally a gazillion memories of my thing from like peeing and baths and private time across, like, our whole life. So, of course you know what it looks like because it's still the same. But, now you've got a new grass boy ding-a-ling and I have no idea what it looks like because you won't show it to me and it's not fair!"

Finn sulked, silently, on the floor after finishing his rant.

Fern sat up on the couch and closed his eyes, massaging his forehead.

"Okay," he said quietly.

"Okay?" Finn repeated, his face perking up at once, "I can see it?!"

"Yeah. I'll show it to you... IF I get to sleep in the bed for three months."

Finn's face fell a little.

"How about one month," he bargained thoughtfully.

"Three months, Finn," Fern replied, stubbornly.

Finn didn't love the idea of giving up his bed. But, to be fair, in a way it was Fern's bed, too. And it had to be hard for the grass boy sleeping on the couch all the time. More importantly, Finn was dying to know what Fern's thing looked like.

"Deal," the blond said, holding out his metallic hand.

"Deal."

Fern grabbed his hand shook it, before climbing off of the couch.

"Where do you think you're going, Fern. Drop those shorts, boi!" Finn demanded eagerly.

Fern roll his eyes.

"C'mon, psycho. We're going upstairs. I'm going to bed the second I hold up my end of the bargain."

Finn saw no issues there so he hopped up and followed Fern up the stairs to his and Jake's bedroom.