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Dipper hurried the last few steps to the bathroom, and quietly slammed the door behind him.

 

"Hnnnh."

 

He abandoned his self-control, and let his face sag with pleasure. He wasn't touching himself, but it was still coming. He stumbled over to the toilet, and yanked himself out of his shorts. Just as the feeling reached its plateau, he gave his throbbing erection a few frantic strokes.

 

Dipper's knees trembled as a fountain of white poured out of him. It was the third time, and it still came out, spurt after spurt. He let out a moan, in pleasure, and desperate frustration that he didn't have a clue what to do about it.

 

So he waited. He leaned against the wall, catching his breath, and congratulating himself for getting almost all of it in the toilet bowl somehow.

 

Hadn't this been happening for weeks? He had thought it was puberty. Random boners, sure, but recently he had felt these strange rushes of pleasure, that sneaked up on him at random intervals. After a while, they weren't even necessarily getting him hard; like he'd gotten used to them. But they still got more and more intense. Even so, he had read a few books about puberty that seemed to call just about everything perfectly normal.

 

Well this couldn't be. Even the lust he felt seemed out of control. As the feelings built up again, his thoughts ran wild, with Wendy, Mabel's friends, any girl, every girl, screaming underneath him, his hips pounding into them.

 

His orgasm came closer and closer, slower and slower. It crawled up his spine and spread through his body inevitably, like a roller coaster cranking him up the first hill. But he held back. He teetered at the edge, his hands itching to grab the lightning rod protruding from his shorts. But even without a touch, he came.

 

He let go of the breath he was holding and panted as a few dregs dribbled out of him. And he waited. He felt a little more of a sense of finality to that one. He stared at the wall for a long time, and his cock sank back down, but his feelings didn't. The pleasure still rang in him.

 

This had to be something supernatural. Puberty couldn't make this happen. Even drugs couldn't make this happen.

 

He looked at himself in the mirror. He watched his expression betray his feelings as the pleasure rose again. It was weaker this time, stopping short of orgasm, but it was still there. It came and went, getting weaker every time, but it wasn't headed towards disappearing anytime soon. Dipper waited, staring at himself, until he could keep a normal expression through the whole thing.

 

He looked at the bathroom door. Did he really have to face a day like this?

 

If only he could just stay in the bathroom all day.

 

<><>

 

Oh god. Thank god. Mabel understood something.

 

She had spent the whole day in a daze. Faint groans escaped her throat, her body trembled, she was sure her face was beet red. And it wasn't just the embarassment, but the temptation. The feeling that wouldn't go away was never frustrating, but it was so new, and so powerful, that she couldn't let go of the urge to wallow in it. Every time she was alone for too long, or in the bathroom, she masturbated once, twice, three times.

 

And each orgasm was as powerful as the first. That morning, as soon as Dipper had gotten out of the way, she had masturbated. And she came so hard and fast that she wondered whether it was her first, and whatever she had felt before she had just confused for an orgasm. She'd never felt anything so good. And then they kept coming. She couldn't hold them back, even when she stopped using her fingers and cupped her hands to herself, as if it would protect against whatever was assaulting her. And she huddled in her bed, hoping desperately that she wouldn't have to explain herself if Dipper came back into the room. But he didn't, not until she lay on the bed, sated and exhausted, waves of pleasure still lapping at her mind.

 

And if Dipper seemed a little too evasive, or even understanding as she tried to keep a straight face, she thought nothing of it.

 

And now he was standing next to her, and the pleasure was surging. It was a pulse, now, going in and out in only a second or two, like a soft, slow orgasm that hadn't stopped since they had started to brush their teeth next to each other. And it was getting stronger.

 

Mabel took a deep breath. "Dipper?" she asked. "Do you feel that?"

 

They made eye contact, looking at each others' reflection in the mirror, a look of slight panic in their eyes.

 

Two minutes later, Dipper and Mabel stumbled into their bedroom.

 

"We shouldn't be right next to each other, that's... ...probably what did it."

 

"Well I'm... not going to get stuck somewhere embarrassing because of this!" Mabel responded, their voices in a whisper.

 

"Hgg... I can't sleep in the bathroom!"

 

"Ughhh... just go back for a little while. That-" Mabel trembled a little. "-that's what you did this morning, didn't you?"

 

Instinct scraped against mental barriers as the two leaned against each other in the doorway.

 

"Okay."

 

This time, he didn't hit the toilet. His first shot came out so violently it might have put someone's eye out. It collided with the back wall with an audible splat. He left a trail of cum that slowly dripped down the wall. The next ejaculations came rapidly, after only a few seconds. He came three more times, until he ran dry.

 

His cock stayed swollen and dark with blood, even as it sank down. Dipper did his best to clean everything up, but this time, he was still coming. The wave weakened, but it still brought him to orgasm every time it hit him.

 

A few minutes later, he walked into the bedroom, jelly-legged. He locked the door behind him.

 

"It isn't working."

 

"Nnnnn."

 

Dipper stumbled into his bed and hid under the covers. "At least I... wwon't make a mess in my pants."

 

"A- a- aren't you going to look it up?"

 

"I flipped through the whole... I..." Dipper forgot what he was saying.

 

"The book," Mabel moaned softly.

 

"If this was in it, I'd... ...remember it."

 

"You'd use it on Wendy." Mabel said. She laughed quietly, then her breath caught in her throat. "Uuuuuu... It just got... are you thinking about her?"

 

"I really want to fuck her right now," Dipper said bluntly.

 

Mabel was sure he was stroking himself. "Ohhhh. You..."

 

"Sorry. I'm making it worse."

 

Mabel slid her clothes off under the covers. "No," she acknowledged, "you're making it better."

 

They slept that night, but only because they fainted.

 

(more later)