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Jimin has always been short, Taehyung has always been tall. Jimin has always been small everywhere, Taehyung has always been big everywhere. It was just natural that they'd be like that down there too.
Sometimes, the difference between them would bother Jimin, but Taehyung didn't seem to mind; in fact, he seemed to like it. Jimin was very shy about it at first, but eventually he learned how much Taehyung loved his little dick. Taehyung would always shower him with bittersweet compliments, praising and humiliating him at the same time.
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Jimin was lying lazily on their bed, his husband settled between his legs, hands on Jimin's hard member. Jimin had just gotten off from the shower, his wet, naked body dampening the sheets.
"What a pretty little thing you got here, Jimi." Tae muttered, kissing along the short length. "So cute and little. I can see why you need me to dom you, baby."
"Shut up, you know I can dom you just as well..." Jimin protested, voice raspy from how tired he felt at that moment. "I'm not that small..."
"What did you say?" Taehyung quirked an eyebrow at him, smirking. "You are small, Jimi. I don't even think you can fuck anyone with this..." He chuckled, jerking his husband's cocklet while speaking. "You've never fucked me anyway... Even when you dom me, I do all the fucking."
Jimin sighed, closing his eyes shut and trying his best not to buck into Tae's hand - his fingers, actually. He was so small that all it took for Taehyung to jerk him was his thumb plus two of his other fingers.
Taehyung took the opportunity to hover above Jimin's body and pull his own cock out to stroke them together. His large hand could easily hold both of them, moving swiftly up and down their shafts.
"Oh..." Jimin moaned, eyebrows furrowing together and mouth hanging open. "Oh, Tae... Feels so good, fuck..."
"Open your eyes, baby. Open them." As soon as Jimin obeyed, Tae smiled. "Look down, Jimi. Look how small your cock is beside mine, ah..."
The sight made Jimin even more horny, his cocklet twitching and leaking precome, only for Taehyung smear it all over them. Tae's hard member seemed so huge next to his, Jimin was so turned on that he couldn't even speak properly.
"Tae. TaeTae, please." He moaned out, grabbing the sheets around them and sobbing. He was too close to finishing, he really needed to come.
Taehyung squeezed their cocks together, moaning long and low, followed by a trickle of precome. Jimin soon couldn't take it anymore, bucking up his hips and biting on his lower lip. Taehyung didn't need to ask to know what was going on, so he sped up and continued to tighten the grip on both members.
"Come for me." Tae told him, repeating it a few times more before Jimin's vision went white and he came in short little spurts, crying out in pleasure. "That's it, baby, let it all out of your tiny dick..."
As soon as Jimin finished himself, Tae pulled away and continued stroking himself, soon coming on Jimin's stomach with a soft moan. Then, he laid right beside Jimin - his member properly tucked back into his pants - and offered him a big boxy smile. Jimin smiled back at him, sleepily lifting one hand to pet the younger's hair.
"We should get cleaned..." Jimin muttered, his voice even deeper now.
"Nooo..." Tae answered in a childish manner, turning to the side to cuddle with Jimin. "I think I want a nap..."
And then Jimin melted.
"Alright, you big baby." He laughed, cuddling him back. "You can take a nap."
Cleaning up could definitely wait.