An 90-year-old man goes to the doctor... After the examination, the doctor says ""For a man of 90, you're in remarkable shape. How old was your father when he died?"" The old man looks offended. ""I never said my father was dead. He's 115."" The doctor is shocked by this. ""A hundred and fifteen?"" he gasps. ""That's amazing!"" The old man smiles. ""He still lives on his own, walks around his neighborhood every day, volunteers at the Veterans Hall and has a part-time job as a greeter at Walmart.…