Disclaimer: I DON'T OWN ADVNTURE TIME!

…Tree Fort

Finn held the proud grin off of his face as Marceline looked on in awe.

"Nice," she said, nodding her head appreciatively.

"Yeah, me and Jake built it," he shrugged, "and dad."

Marceline said nothing, walking ahead and already climbing up ladder going up the tree and leading into the so called "Tree Fort of Awesome."

"It looks really cool in here and all," he heard her call from inside. She poked her head out of window to look down at him. "But it smells like butt."

Finn climbed up and walked in, his face scrunched up thoughtfully. "… Whose butt?"

Marceline rolled her eyes. "A butt, Finn. A butt."

"It can't just be any butt, Marcy," Finn said matter of factly, index finger pointed up and all, in some wise way. "Do-"

"You're suddenly an expert on butts?"

"Does…" Finn continued, ignoring her question… and the heat rising to his cheeks (the cheeks on his face, thank you), "it smell like a human's rear end?"

"Nope, more like an animal's butt."

"Oh," Finn stated, staring at her blankly. Then, with the serious façade he had completely dropped, he started to animatedly wiggle his butt. "Like a monkey's?"

"Nah," she said, playing along. "More like a bat's."

Finn paused, stumped. "Bats… have butts?" He stared at Marceline incredulously.

Marceline shrugged her shoulders carelessly. "I'm assuming. How would they poop?"

"Do they poop?"

"I'm not a bat genius!" Marceline spat. "You butt expert!" She looked at him pointedly. "And don't be proud of that."

Finn raised his hands defensively. "I'm not!"

Marceline nodded her head. "Good." She kicked an empty juicebox towards Finn, who easily sidestepped it. "Because pride is something that ya gotta earn, and being a butt expert is not the way to earn it."

Finn, already on the offensive with a can already having been aimed at his head and all by some crazy girl with even crazier foot power, reached into his pocket for a few spare marbles he kept on hand. "Then what is?"

Marceline was reaching into her pockets too, smirking at him. "Beating me!"

Finn was more than a bit surprised when Marceline suddenly had a water gun aimed at him, and knowing her, she'd probably squirt in his eye or somewhere equally sensitive.

So he raised his hands to his face before she had the chance, and didn't think about the possibility of her squirting somewhere… lower.

And there he was, the sound of Marceline's signature evil cackle coming from somewhere in the tree fort…

And large, wet stain at the crotch area of his shorts.

It certainly did look like he had peed himself…

And, oh, was she going to pay.

(A/N): Hmm… _