Laura : What's wrong, Hal? Are you OK?
Hal : Oh, hi, Laura. I don't know. I just don't have much energy.
Laura : Hmm, Do you eat breakfast every day?
Hal : Sure. And I exercise. I lift weights at my gym.
Laura : And how often do you go there?
Hal : Three or four days a week.
Laura : That's not bad. How long do you spend there?
Hal : Oh, about an hour a day.
Laura : That's good. And how much sleep do you get?
Hal : Quite a bit, about ten hours a night.
Laura : Ten hours? That's why you don't have any energy. I think that's too much sleep!