Eventually the hands stopped tickling their knees and the three girls were left panting for breath. "Now, wasn't that fun?" the voice asked.
"No!" Demi said.
"You were laughing."
"That doesn't mean we liked it!" Demi shot back.
"Of course it does. Humans laugh when they're happy, you were laughing, therefore, it must have made you happy."
"We don't just laugh when we're happy," Miley butted in.
"When else do you laugh, then?"
"You laugh when..." she tried to think. "When someone tells a joke."
"Yes, but that's because you find it humorous, which makes you happy."
"Uh uh," said Demi. "Maybe you're laughing to spare their feelings, but it's not making you happy."
"But you are forcing yourself to laugh then," the voice pointed out. "You could not laugh if you didn't want to. Are you saying you don't have to laugh if I tickle you? That you only do it to spare my feelings?"
Demi wasn't in the mood for a philosophical discussion. "It's different because I told you it's different!"
"So you claim, and yet, your comments make little sense. Humans only ever laugh when they're happy... or being tickled. It is highly unlikely that one unique and unusual exception would exist to such a clear-cut rule, and far more likely that you are laughing because you're happy."
"But we already told you-"
"Yes, but as I said, logically speaking, it's more likely it makes you happy. You just may not be aware of it consciously. More study will illuminate this." The hands began unbuttoning Demi's blouse. "If you can manage not to laugh at all for the duration of this little play, perhaps I'll be more inclined to hear you out."
"What are you doing?" Demi demanded.
"I thought I'd kill two birds with one stone. These proved quite intriguing - perhaps I can find something interesting with a closer examination." Her blouse was pulled open, revealing the lace red bra underneath, barely containing her now gigantic breasts. The hand gestured like a conjurer, and a large, fluffy feather appeared in its grip. Demi tensed as it came down, and slowly ran along her cleavage, all the way down to the bra. She bit her lip and closed her eyes, and the feather ran back up her cleavage again. Her face shuddered, and she started to blush as the feather ran back down again, drawing its fluffy tips all along the soft flesh as it went. Finally a laugh exploded out of her mouth, and she couldn't stop. The feather ran up again just as slowly, and Demi laughed harder. "Not even a minute," the voice chastised her. "Not that time has any real meaning here, but the point remains: you can't help but laugh, can you?"
"Stop it! Hahahahaha!" Demi threw her head back up and laughed as the feather began brushing along her jiggling breasts, now tracing just above where it squeezed into the bra on one cup, then down the other the same way. "It tickles! Stop!!!" There was a pop and, to her horror, more feathers appeared and began brushing along the exposed flesh. While that happened, the one the hand itself was holding was slid into the cleavage, and the hand began drawing it up and down like a saw. Deep belly laughs began erupting from Demi's mouth under this new ticklish sensation. "Truly you must be enjoying this," the voice remarked, and the feather grew larger, as did Demi's accompanying laughter.
"Don't think I've forgotten about you two," the voice said to Miley and Emily. Their blouses began unbuttoning as well, revealing similar bras on their own enormous knockers, although matching their outfits. "But I think I'll tickle Demi a bit longer first, it should be interesting. But what to do to keep you from being bored... Ah!" The gloves came forward and again began squeezing their breasts. Miley was furious and tried to shake them free, but wasn't able to, and the hint was obviously lost on the voice that owned them. It explored the combination of softness and firmness of both girls boobs, squeezing and stroking and rubbing while they could only sit there and watch. Demi's laughter reminded them both that at least they had it better than her.
After a while, Emily leaned her head back and closed her eyes. A small sigh escaped her lips, then another. Yes, they needed to get out of here, and the voice wasn't helping them. And yes, it did tie them up and tickle them. And sure, it was currently groping her, but.... but... she sighed again. But it felt so good. The hands were putting these new boobs through their paces and seemed to be finding all the ways she liked them to be touched. "What is that noise you make?" the voice asked. Emily started feeling very embarrassed. "What is it?" Emily looked over at Miley for just a second.
"Nothing."
"It must be something, or you wouldn't be making it."
"Please, can you just drop it?"
"I want to learn about you, Emily. We're going to be spending eternity together." Emily still didn't answer. "You know, they can't hear what you're saying."
Emily looked at Miley again. "She's right there."
"That doesn't mean I'll let her hear. You can talk to me about anything, Emily. Like I said, I want to get to know you."
"You're certainly doing so in one way," she commented, watching the hands continue to fondle her jugs.
"Tell me, please."
"It was... I liked it, okay?"
"That noise was also a sound of happiness?"
"Sort of. It's embarrassing, okay? It was-" she thought about how to make it understand. "It was happiness from you touching me in a way that's... stimulating."
"Stimulating?"
"Yes," she said sheepishly.
"Is there any connection between that and the fact your nipples are larger and firmer?" Emily wanted to die. "I couldn't help but notice, and it hasn't happened with Miley, who doesn't seem very happy." He waited. "Can you hear me?"
"Yes!"
"I just want to understand you, Emily," it repeated. "Is this something significant?" The thumbs began rubbing her nipples through her bra, and Emily groaned despite herself. "Curious. Is this-"
"Don't talk," Emily said. "Just keep doing that..."
"All right." Emily closed her eyes and leaned her head back, a smile on her face. When the hands attempted the same with Miley, however, she just scowled at them.
Demi, in the meantime, was about to have things really get worse. Her bra unhooked in the front, allowing her breasts to finally spring forth for all to see. To continue this interesting discovery, the hands decided to examine her nipples, and so each brought a fluffy feather in and drew it along them. Her laughter jumped up an octave at the touch, and became even more desperate as they continued drawing the fluffy feathers along her sensitive nipples. "NO! STOP THAT! HAHAHAHAHAHA!!!" Soon her nipples were just as erect as Emily's were, and she was clearly very happy. This further proved the voice's belief that tickling made them happy, and it was bound and determined that they be happy here forever and ever. With that in mind, it began applying even more feathers to Demi's breasts, which proved difficult because with so much laughter and struggling they were bouncing all over the place, so eventually more hands held them steady so the tickling could continue. While Demi pleaded with them to stop, the voice knew her laughter meant to not to, and it continued running the fine feathers all over the massive jugs to find all the most ticklish spots. Demi pulled at the bonds on her arms, trying to get away from the agonizing tickle torture. Sure, it was hopeless, but as hour after grueling hour passed, with the voice finding more and more ways to use these feathers on her poor helpless tits, Demi was desperate for any kind of escape. She'd begged countless times, even pleaded that it at least leave her nipples alone, but that had only encouraged it to apply even more there, teasing them until she thought she was going to explode from the laughter. But the voice continued letting its hands and feathers explore her tickle spots, realizing as it did that not only was this tickling interesting, but that it liked it. Tickling Demi like this was incredibly fun! So it decided to: