One of two ideas (the other was "Kindness") I got after my nephew got me back into Dragon Ball Z… and I looked up Vegetto again after many years of buried interest. I love him so...
EDIT: 14 October 2015 - From the creative criticism received for chapter 1, I tried to edit this again, to have it make more sense and fix some things that have bothered me while reading this again.
"Vegeta! Put the Potara earring on your right ear!"
"You were holding back when you fought me!"
"There's no time for pride! Buu ate everybody else - Piccolo, Gohan, Goten, Trunks, and even Bulma! That's how he's gotten so strong now!"
"Grr… Give that to me!"
Goku handed over the Potara, a smile on his face.
There was nothing that was deterring Vegeta as he put the earring on, not even the thought of being merged together with Goku permanently. For his mate and for his son, he would do this. He was sure that for the other Saiya-jin, he was doing this for his mate and sons as well.
"There!"
As he put the earring in a proper place that allowed it to stay securely, Vegeta felt a sudden pull towards the other Saiya-jin. There was surprise, light, and suddenly…
There was warmth, and it felt wonderful. Kakarotto had had a much different experience living on this planet, this blue rock that had gained no interest from Frieza, truly. The human culture had accepted his eccentricities of strength and persistence in battle. That strange acceptance that the other Saiya-jin had recognized, Vegeta accepted.
He felt Kakarotto pressing against his mind, curious. There was hesitance, but Vegeta found the curiosity innocent, in the way that Kakarotto always held himself, and he let the other Saiya-jin in. The curiosity entered his heart, and he saw even more of the life that Kakarotto had led, of the armies, assassins, and many demons he'd seen and defeated. Such strength, and Vegeta felt that he could never match it.
'Could I ever..?'
'Yes!' Energy began running through him, and such determination and drive that Vegeta had never felt. He had his own, but this energy held such innocence and brutality that Vegeta had perhaps felt in his infancy. It held no maliciousness - only light.
'Why... is it so calm here? Not lonely?'
'Because we're together.' Kakarotto nodded and approached him.
Such generosity… It felt…
'Come closer…' Vegeta did, and he felt Kakarotto embrace him. It felt... 'It's nice like this… Isn't it, Vegeta?'
'... It is.'
Some light emerged between them. It was an accumulation of everything that Vegeta had felt, and they had come from Kakarotto as well.
'What is it?'
'Our Potara fusion.' Kakarotto reached out to it, and it responded to his caresses. It had a voice that was permeated peace and viciousness, a perfect combination of the two. 'It's forming now, and everything here is as fast as this light shining right now... When I saw Dai Kaio-sama and Kibito fuse, it was an instant. Just before the light.'
'This is us, then? A light?'
'Our bodies will be the same once the light is born. Calm and vicious,' Kakarotto stated, echoing what Vegeta himself had thought. '... There's love there too.'
'Love?' Vegeta wanted to scoff, but he felt it. All the care he had ever felt and would feel for his son, mate, his race… It was there. Strangely, he felt similar emotions towards Kakarotto's sons and mate. Was this fusion, then? Their minds together, as well as their emotions…
The happiness that Kakarotto had felt when meeting him, fighting with him… It mirrored what Vegeta had felt when encountering their youngest pure-blooded Saiyan that had survived the genocide, the only other one in existence. He didn't truly have a physical need to conquer the other, only to fight him. Yet, he found himself obsessed.
He turned and found the younger Saiya-jin pouting his lips slightly. With this amount of energy and intimacy, Vegeta found himself recalling something primal. He found himself responding to it, in the same mindset that he had felt when meeting the Saiya-jin fourteen years ago. The only one left of his race, and the feeling to continue their bloodline continued as a base instinct alongside the one to conquer.
'Do you know what you're doing?'
'... Not really,' Kakarotto responded, panting slightly. The confusion was evident in his face. 'Can I… Show me? What it means?'
He felt caresses against him, asking permission. Kakarotto was quiet - miraculously - and Vegeta found himself growing warm at the soft touches. There was a roughness to them but always considerate. It was different than Bulma's touches, and he could see that they were different than Chi-Chi's as well.
Kakarotto had his own way of touching, almost of worshiping, that had Vegeta recall the barbarity of his Saiya-jin blood. His blood began to pulse through him as it used to when seeing the Moon, the ferocity that urged him to destroy- to claim- to devour. His breath heavy, his teeth sharper; Kakarotto would give way beneath him. He would devour this only other one like him, and he found himself lusting over the thought, the same way that he felt Kakarotto's mind craving it.
He lurched forward, burying his teeth into Kakarotto's neck, to which the other responded with a loud keening. The skin beneath his tongue was thrilling, a pulse that was matching his own and tasting like Saiya-jin blood. In the space where their souls were existing, Vegeta pushed the other down, claiming him and ripping himself away to devour another part of the body beneath him. The blood that he drew appeared as liquid light, the color that their ki took when reaching the level of Super Saiya-jin. The hands that came up to continue their caresses came more fiercely, nails digging into him and drawing blood as they drew down.
Kakarotto's head came up as well, drawing blood from Vegeta's neck, and just as Vegeta came forward to claim his tongue and taste, he found the liquid light in Kakarotto's mouth to be mesmerizing. Their tongues battled, Kakarotto's trying to claim his mouth and enter as deep as it could. It was as though he wanted to climb inside of Vegeta and stay there, taking and giving - because that was the kind of man he was, generous - that precious light.
When Vegeta pulled away, he saw Kakarotto's eyes. They were as blank as the Moon, and his teeth were fangs, only wanting. Kakarotto was saying his name in a way that could be described as 'needy' but there was an earnest nature to it. Vegeta wanted to appease that and abuse it, the greedy nature that Kakarotto was known for, the desire that he felt to always grow stronger. That greed that mirrored his own once he had met the younger Saiya-jin. He pressed forward, giving into the light. Kakarotto pressed against him, refusing.
'Why?'
'Let me,' was the only answer Kakarotto gave. He pushed Vegeta back, not into a dominating position however.
Vegeta was now straddling the younger Saiya-jin's waist. He and Kakarotto were disrobed by the light between them, which was eagerly waiting for whatever was about to occur.
'It's watching.'
'It's happy,' Kakarotto explained, pressing harsh kisses to Vegeta's jaw. 'It's waiting to be born, and it feels loved, I think. I feel loved, with all these kisses you're giving me.'
'Shut up.'
Following instinct, Vegeta let out a small snarl and dug his fingers into Kakarotto's hair, pulling back his head and baring his neck. Being pushed down by the shoulders, Kakarotto struggled for a moment, pouting slightly. Vegeta laughed softly, sneering down at the other, shoulders relaxing somewhat.
Taking in the other's expression, Kakarotto looked confused for a moment before grunting. He raised a hand to Vegeta, slowly. In response, the older Saiya-jin raised one of Kakarotto's own legs over his shoulder. He grasped the offered hand in one hand and pounding the space beneath them in a show of power with the other. Kakarotto let out another soft grunt, humming as the light around them grew.
Kakarotto's body was warm and tight and pleasurable in every way that Vegeta had found Bulma not to be, due to the other's body not structured for reproduction in this sense. Bulma couldn't handle the stress of mating with a Saiya-jin, the force of which was never held back in such acts of intimacy, as their powers searched for compatibility. Her voice didn't resonate with his in a duet that Kakarotto naturally made with his, a song of submission, dominance, and togetherness that flowed in their veins. Kakarotto displayed a wide smile as Vegeta came down to bite his neck again, marking him, and pulling away, jerking Kakarotto's pliant leg - that lay to the side - up to rest on his other shoulder.
Kakarotto was almost thrashing beneath him, trying to thrust against him. His eyes were still wild and he managed to bite Vegeta's wrist when the pounding fist had stopped its movements. Vegeta laughed and let the other Saiya-jin's legs fall from his shoulders, grunting in pleasure as Kakarotto's body became even tighter as that; it was also enjoyable to see Kakarotto let out a keen at the difference in sensation.
For a moment, Vegeta stopped. He monitored the other's reactions. Kakarotto was panting, his mouth open. Vegeta came to bring their faces closer, humming in curiosity at the emotions behind the expression. Kakarotto's eyes showed no aggression, no sign of wanting to fight for his dominance just yet. The scent of Vegeta was still in his mouth, and Vegeta could taste Kakarotto on his tongue. He could even smell it on his own body. He panted, laughing at the naivety of the other; even without having an education of mating behavior, Kakarotto still left his scent on him with his earlier caresses. He thrust one time and was shocked to hear a whimper to match the face of a Saiya-jin that had given in, open-mouthed and grunting. Kakarotto looked to Vegeta, lust the only identifiable emotion there, and nodded, panting.
He was only happy to oblige.
The duet settled into hoots, grunts, and whimpers, a song forming that made their Saiya-jin blood run more quickly, their hearts pumping more fiercely. The light around them was not their concern now, only that they were initiating something that hadn't been created since the destruction of their mother planet so many years ago.
The light rejoiced, and it was born.
Works Cited for Saiya-jin Behavior: Available on AO3 version of story
Comments are much appreciated.