The first says: "Fellas, I got real problems. I'm seventy years old. Every morning at seven o'clock I get up and I try to urinate. All day long I try to urinate. They give me all kinds of medicine but nothing helps."
The second old man says: "You think you have problems. I'm eighty years old. Every morning at eight o'clock I get up and try to move my bowels. I try all day long. They give me all kinds of stuff but nothing helps."
Finally the third old man speaks up: "Fellas, I'm ninety years old. Every morning at seven o'clock sharp I urinate. Every morning at eight o'clock I move my bowels. Every morning at nine o'clock sharp I wake up."