[ WP ] Two people discover a fountain of youth . The problem is that upon drinking the water you turn back into an infant . The two decide to take turns raising each other in order to live forever until one day one of them decides to break this agreement .

At 75 he had been stubborn. At 120, irascible. But now? At 193? He was downright impossible to deal with. It's one thing to become set in one's ways. It's another thing to insist on lighting a cigarette in a booth of a small Long Island diner. It had been more than 10 years since smoking in restaurants had been banned in New York. But these small steps in cultural evolution had had little impact on Walter. 
 
 Simon glanced up, then quickly away as Walter took a long, slow drag and allowed the smoke to drift lazily from between parted lips. Simon did n't dare utter a warning. He'd been down this road too often. Why draw Walther's wrath when some waitress would come along soon enough to do the deed? Only it was never Walter they chastised. Simon would bear the brunt of the scolding. 
 
 “ Are you crazy! ” they usually began. “ How can you let a child have cigarettes?! ” “ How can you let a child drink liquor?! ” “ Why is your little boy looking up that woman's dress!!! ” The vices of an old man had become Simon's parenting nightmare. 
 
 And here they were again - another frowning waitress hovering over them. Simon could do little more than look helpless and try to snatch the burning butt from the apparent seven year old. But Walter was quick. His “ youth ” gave him the advantage of speed and dexterity. He'd duck and dodge and play the spoiled brat to perfection, eyes glittering with perverse glee. He seemed to savor Simon's discomfort. It was unmistakable. 
 
 “ You're not my real father! ” Walter shouted before scurrying under the table. 
 
 Simon went beet red as he nervously looked at the waitress. “ He's just joking of course... You come out from under there right now! ” Simon demanded hammering on the table, sending the salt shaker skittering sideways with every slam of his fist. 
 
 A searing pain caused him to howl as the lit cigarette was pressed into his kneecap. The sound of wicked-little-boy laugher sliced icily through the greasy air of the diner. 
 
 People were looking now. Too many people. Drawing attention was never good, but stunts like this were becoming downright dangerous. People assumed that Simon was Walter's father, and a terrible one at that. How long before someone called the police? They could n't go on like this. 
 
 Simon attempted a weak smile, his eyes glossy with the dew of burn-pain. The waitress scowled and turned on her heels, retreating toward the kitchen. He was pretty sure she was n't checking on the soup of the day so he'd have to act fast. Where Walter had agility on his side, Simon had man-hands and grown-up strength. While attempting to look as casual as possible, he fished under the table until he'd cornered Walter. His fingers found purchase among the ample curls of the man-boy's hair. Sliding sideways, he gave a mighty tug and extracted Walter as he hurriedly exited the booth. 
 
 His strides were long and resolute. They crossed the restaurant with such speed, he looked like a traveller trying desperately to catch a flight, suitcase flailing in tow. 
 
 Once outside, Simon regained enough composure to realize it would not look well for him to be dog-walking this “ child ” down the street by his hair. At the first alleyway he ducked in, yanking Walter after. Now, behind a dumpster, safely out of view of the street, they squared off. 
 
 “ Goddammit, Walter! Do you have any idea the trouble you could have gotten us into? Gotten ME into? It's like... ” 
 
 “ Spare me the histrionics. ” Walter interrupted peevishly. “ Really, you're like a woman the way you go on. ” 
 
 “ No! I mean it! This has got to stop! I swear with every rejuvenation you become more and more impossible. We have to be discreet! ” 
 
 “ What discreet. You have n't figured it out? They're cattle. They're meat. We're immortal. We do n't have to play their game! The world is OURS! Eternity is OURS! ” 
 
 “ They... are... DANGEROUS! ” Simon exclaimed. And then, as if trying to distill the seriousness of his message, he hissed through clenched teeth “ And that makes your carelessness dangerous. It makes you dangerous... to me. ” 
 
 “ Sissy. ” Walter replied flatly. 
 
 Simon stared, stupefied at his longtime companion's glibness. He'd never been particularly fond of children. And since this really was no child, he took advantage of the opportunity to slap the shit out of him. No, literally he slapped him so hard a little piece of poop came out. 
 
 And that was that. There was nothing left to say. The race was on. Now all that mattered was who would be first to get to the supply of elixir.
