How often should I shampoo my hair?
user
That depends on the length of your hair and how often you style it. If you style your hair only occasionally, I would recommend that you wash it about once every five days. For frequent styling, I would recommend washing your hair more often than that, but not more than about twice a week.
assistant
Okay, why shouldn't I do it too often?
user
Washing your hair too often causes your hair to become dry and brittle.  Shampooing causes your hair to lose the natural oils and moisture your hair needs.  If you wash your hair too often, you are essentially depleting your hair of the natural resources it needs to stay healthy and beautiful.
assistant
How often should I shampoo my hair?
user
That depends on the length of your hair and how often you style it. If you style your hair only occasionally, I would recommend that you wash it about once every five days. For frequent styling, I would recommend washing your hair more often than that, but not more than about twice a week.
assistant
Okay, why shouldn't I do it too often?
user
I've noticed that when you wash your hair more frequently, you start to lose some of your hair. This is a natural consequence of washing your hair too often. If you keep on washing it, you might even lose a lot of your hair. If you lose a lot of hair, you won't have any more hair to style and this might make you feel bad about yourself. Is this something that you don't want to happen?
assistant
How often should I shampoo my hair?