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Azmuth hopped down from Ben’s arm letting go of the Omnitrix which he's been tinkering with for the past hour.
“Finally the new setting has been added. Please do not ask of anything of me for the next few days. This was already enough of a hassle” Azmuth turned to leave the room. Ben looked down studying the Omnitrix.
“Thanks a lot”
“Just don’t do anything stupid” Azmuth quickly left the room leaving Ben to his own devices. Ben didn't look up from the Omnitrix remembered when a few weeks ago he asked Azmoth to allow the Omnitrix to essentially cut the middle man out and just funnel the alien DNA straight into his human body. Transforming into aliens all the time left him feeling a bit dissatisfied with his normal body. He had worked out as much as possible but there’s only so much hard work and steroids can do before your body reaches a limit. Ben wanted something a bit more galactic to juice him up.
Left alone he decided to study himself before this experiment went down. He stripped his clothes off and looked into a mirror. To put it frankly he was so fucking sexy. Broad shoulders, massive pecs, ripped abs, tree trunk thighs, not to mention the python between his legs. But it wasn't enough for Ben. He looked back to the Omnitrix and just thinking about how his body might look made his dick jump. He wanted to grab it but he needed his hand to turn the watch’s nob.
“I think it’s obvious who to go for first.” He turned towards Four arms and pushed down. He could feel the tetramand’s strength coursing into his body. He could feel his muscles getting bigger having to move around slightly as the growth seeped into his body. He could feel his body stretching as he gained some height as well standing at a solid 6’7. As he breathed out, he could sense his voice had also dropped.
He looked back in the mirror admiring his new body. He did a double bicep flex into a pec flex before running his hand down his abs.
“Ugh I look good. My voice too.” He always felt so good as Fourarms. The voice, the muscles, the height. Although this wasn't perfect. It was like the Omnitrix was holding back on him. But it wasn't like he hadn't messed with the Omnitrix before.
He walked to one of the desks in the room and pulled out a key. Honestly, just walking around with his new bulk just caused him to want to lay down and start stroking his cock but he had to get bigger. Taking the key, he jabbed it into the Omnitrix with it seemingly doing some recalibrating.
“Hopefully that worked” one sign of success was that he could pick another alien to transform into. Before transforming, he flexed his bicep.
“My arms could be bigger” instead of going to Fourarms, he decided to Humungusaur instead. Hitting the watch, he could feel his waist slimming up, his arms becoming bulkier and longer, his lats bulking up, as well as his pecs getting larger. He did another bicep flex feeling up it’s new strength. He went back to the mirror and this time did a back pose. He looked back seeing little spikes jutting out of his skin and down his mid back.
“That’s more like it” he said slightly moaning as he did. His dick started to raise as he studied himself. He looked down at his legs, them now slightly lacking. He went back to the Omnitrix looking through the roster.
“Who has some sexy legs-there we go '' selecting Frankenstrike his body even out a bit while still growing. The most notable difference is that he got wider. Not even stopping to flex, he went back to Fourarms selecting him again. And again. And again. This is where his body really began to change. This was ecstacy for Ben. He only stopped when while both hands were on the watch, another went to stroke his cock. He tried to look down but his pecs were getting in the way. He looked up at the mirror. Another pair of meaty arms had sprouted under his original. Not only that but another cock sat next to his original one.
“Fuck yes” he now studied his body it looking slightly more red but way more muscular. He ran his free hands up and down his body feeling all the new bumps and ridges now proudly shown on his body. The room also started to feel a bit small to him, his head almost touching the ceiling. He needed more though. Clouded by horny thoughts, he twisted the dial away from Fourarms.
“Waybig make me a muscle god” he pushed down and waited before he felt a burning sensation. It was like too much DNA going into his body at once. But after a few seconds, his growth went into overdrive. His muscle started bulking up at a rapid pace quickly making the room he was in too small. His head hit the ceiling and then some. Before long Ben had to sit down feeling his mammoth sized ass hit the floor. His lats started pushing up his arms while his arms tried to fight back. With the little space he had, he had to spread his legs to make room for the new muscle that was being pumped into them. His pecs bulged out creating massive pec shelves while at the same time growing so large they started creating a shadow. His boulder shoulders hit the walls, cracking from the growth. His traps rose up behind his head dwarfing his neck. His dicks both grew in size the fact they were both hard making the room even smaller. Ben couldn't help but stroke his dicks, run his hands across his body, and enjoy the ecstacy of this whole experience. Eventually he slightly snapped out of his horny fueled trance.
“These walls-” he heard his voice. “Holy fuck” is all he could say before he pushed against the walls of the room then crumbling against his strength. His dicks pushed against the ceiling, crumbling as a response. Finally free, he laid back and fully enjoyed himself. It wasn't long before...
“Fuck fuck fuck” one more stroke and his giant cocks gushed cum covering himself and the surrounding area. It took several minutes before it stopped leaving a cum covered Ben still in ecstacy.
“This was the best idea I’ve ever had”