[ 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 .

`` I just ca n't do this any more.'' He whispered as he carefully set the bag of diapers and formula down next to the baby carrier. The man adjusted the blanket around the infant's sleeping form, tucking the ends in snugly. `` 400 years doing this over and over again. We were supposed to be lovers, not each others' fathers.'' 
 The baby sighed deeply in its sleep and moved slightly. The man put a soothing hand to its cheek. `` I knew that part of us was gone forever, the first time you took that sip and I gazed down at your small form, I knew I had lost the man that I loved forever.'' A tear ran down his cheek. `` And its not even the physical relationship that I miss the most... It's having you, really you, to talk to, to laugh with in the way that we once did.'' 
 He wiped away the tear with his sleeve and sniffed. `` Someday I hope you'll understand.'' He whispered and gently kissed the sleeping baby's head. 
 An hour later, a nurse on a smoke break found the infant carrier and bag of supplies sitting outside the hospital entrance. Inside the bag was an envelope with a paper and a safety deposit box key. The paper read, `` His name is Jack. Please give him this key when he turns 18.'' 
 A week later, the newspaper ran a story of the tenants in an old apartment building nearby, who called their landlord to report an overwhelming stench coming from the apartment next door. After multiple attempts to contact the resident, the landlord contacted the police, who came and opened the door. A body of a man was found lying on his bed, a single gunshot wound to his head, and in his left hand was clutched a handwritten note. The note simply read, `` I'm sorry Jack. Goodbye.''
