HONG KONG (Reuters) - A 107-year-old Hong Kong villager, who still enjoys an occasional smoke, has attributed his longevity in part to decades of sexual abstinence, a newspaper said on Sunday. "I don't know why I have lived this long," Chan Chi -- one of Hong Kong's oldest people -- was quoted as saying in the South China Morning Post during an annual feast for the city's elders. "Maybe it has to do with the fact that I have lived a sex-less life for many years -- since I was 30," said Chan, a widower whose youthful bride perished during...