JOHANNESBURG (Reuters) - South African Nicklaas Amsterdam on Monday celebrated his 112th birthday, vowing that a life without sex had worked wonders for him. „I have never had a woman to give me a headache,“ Amsterdam, who lives west of Johannesburg, told South African papers. „That‘s how I got to live so long. I have never wanted a partner… and I honoured my father and mother so God could spare my life,“ the Citizen newspaper quoted Amsterdam as saying at his birthday bash at a Methodist church.