I was talking about duration more than age, but yeah, I knew a guy in his 30s that would go into a convulsive coughing fit any time he laughed at something. My dad made it to 84, though he'd tapered off a bit the last ten years (well, my mom wouldn't buy him cigarettes much any more and he couldn't shop for himself) but the coughing does distress me with the asthma and all.