Nick had used the Chronoviac to make his brother happier as his armpit. Because Nick was not overly cruel and because he wanted to have a little fun with Jeff until he decided what to do with him for good. Besides, Nick felt extremely flattered to have been considered worthy of Jeff to become. Or rather, his penis. While he could not let Jeff become his penis, he would think of something to turn him into indefinitely. Something that would please his brother and make him less miserable and ready to resort to such desperate ways to get laid and horny. He had all the time in the world top think about it. But in the meantime...
Jeff was now happy. He was hairy, sweaty, always warm and covered in delightful pungent smells. Pungent and potent, it seemed. It was salty and laced with an enormous amount of pheromones. Now, Jeff understood what his mission was. To regulate his master Nick's temperature. To allow him to cool off. To sweat. And most importantly, to spread his pheromones through his armpit hair. After all, the opposite sex was attracted to these pheromones and making sure human females were aware of them, whether unconsciously or not, was primordial. Attracting a female was the point of his owner's life so he could spread his genes. Nick's indirect immortality and legacy was at stake here! And now Jeff was in charge of this crucial mission! He must not fail his master! After all, Nick's genes also contained the codes to make armpits for his future children, armpits that would look and smell like him. So he had to help in Nick getting laid and making baby after baby! Even if Jeff was annoyed at Nick's attitude towards this important goal. He went to the gym, to his classes, to his computer but did not spent every minute or every day attempting to make kids! How was Jeff supposed to work in these conditions? Well, he'd have to do twice the work... Good thing he was there and that he could be in two places at once, being two armpits. Also, Nick wasn't a bad owner. He kept clean and had a good hygiene. He used deodorant but not too much. And these had interesting smells. Not as pleasantly musky as sweat but still very nice nonetheless. And when Jeff got too agitated, Nick scratched him, patted him and showered him with compliments abut how good of an armpit Jeff was. Jeff glowed with pride at these swords and he would have blushed if he could have. Yet as the weeks passed by, he was unaware that Nick had other plans for him and that he would set them into action soon.