My friend suggested this too many times that it annoyed me XD
Rated 13+

    "Come on, Pine Tree!" hollered Bill while he childishly tugged on Dipper's arm.

    "Calm down," said Dipper flatly and sauntered along side of his boyfriend. They strutted around the forest and struck to the heart of the tree maze. The bright tiny of soft yellow faded with the brightening navy blue. It was only the right time when the sun would welcome Gravity Falls' big sky with its morning brightness.

    "Why are we here again?" asked Dipper, shoving his hands into his pockets.

Bill wound himself around to face his love. "Why, dearest," he purred lovingly which caught Dipper's cheeks to set ablaze with a rosy blush, "we're on a date! Or at least, my first date..."

Dipper couldn't stand hearing that sweet tone that rippled with that echoing voice. He ran his fingers through his brown strands and cooled himself down with a soft breeze that came from Bill's whistle.

    "Damn boy," said Bill and chuckled. "You're looking so fine..." He knew teasing Dipper would emit the boy's adorable, angry act. He lifted his shoes off the grass and hovered over to a nearby stump. He twirled his finger around the rings of the dead, elderly wooden organism. The lovely silence and the birds chirruping and the squirrels chattering was all the romantic scenery he needed.

Dipper decided to latch against a tree while he reached up to grasp a sturdy branch. His hips swished elegantly in a furious way. He wanted to hide miserably from Bill's perverted deceptions.

From the stump the demon's glowing hazel eye caught the sweet sweet movement of his lover's rear. He let hispmelf lick his lips while a grin followed. He whistled once more and saw his boy flinch awkwardly when he grabbed another branch overhead.

    "Dear Dipper!" Bill called with his hands cupped around his lips. "Don't dare to hide from me!"

That only made his beloved attempt to seize another branch faster. Bill leaned off the stump and naturally waltzed right to Dipper with soft steps; enough to not even trample a single blade of grass. When Dipper was still his waist-reach he stretched his arms and gripped Dipper's sides. Dipper squeaked obliviously and wriggled Bill's mischievous hands away. He dared to back flip over Bill and sprint down the dirt road.

    "Awe," said Bill in a sarcastically playful sigh of defeat. "Come back, love!

Dipper ran down a rocky stream and trudged through a river, turning his head around. Phew, he thought. No Bill in sight– " GAH!"

Bill appeared in front of Dipper once the boy craned his neck around. "Where's my little Pine Tree running off? I thought pine trees were stuck...where they should be..."

Bill pounced on Dipper and tackled him to the water while they flailed like flopping fish. They wrestled in the water while splashed Raine din them and drenched their hair and clothes.

    "B-Bill!" Dipper protested. "Stop wrestling me like some multi-bear!" He kicked his sneaker against Bill's crotch and watched the demon flinch and moan angrily, cupping his crotch insanely hard. Bill looked about ready to kill him with that angry glare that pierced into his heart.

Dipper gulped and felt the lump ripple in trouble. A hand seized his shoulder while Bill's other hand snagged Dipper's sweater and lifted his back off the water. "YOU ALWAYS DO THIS! YOU FUCKING PEICE OF– Hmmph..."

Dipper wrapped his arms around Bill's neck and kissed his lips hungrily while he blushed crazily against the soft tan skin. He pulled away once Bill asked obligingly for an entrance. "Bill...I'm sorry...I– B-BILL!"

Bill seized Dipper's ass and kissed his collar bone. He leaned into his ear and purred seductively. It made Dipper shiver with a moan. And all Bill whispered was, "I caught the booty..."