It depends on their hair. If you have super curly hair you should wash it every other day... maybe every 3 days. If you have greasy hair then wash it everyday. If you have straight hair just wash it everyday. Mostly every girl washes her hair everyday.
yah
How often you should wash your hair in a cold climate depends on your hair's natural greasiness and how comfortable you are with it. You should wash it whenever you feel like it is too greasy.
Women should wash their hair at least every two days. But I wash my hair everyday.
You should wash your hair every other day or less if the hair is thinning.
You should wash your hair every week if you have thick hair and you don't always put oils in your hair. UNLESS you have thin hair. You should wash your hair hair every other day!
Although I wash my hair everyday, it is said to wash your hair every other day in order to keep the natural oils and not dry out your hair.
They can wash their hair, there is no reason that they cannot.
Models wash their hair often, depending on the work they do.
Every other day should be enough
That's different from person to person? xD Most actually wash their hair everyday because of how much hairspray and stuff is used, but people with f. blue, pink, green hair and all colors, normally doesn't wash their hair that often because it washes the color out. And the more greasy the hair is, the easier it is to style it.
there hair is probably oily
A person should not wash their hair too often because it does increase the rate of oil production. Ideally, folks should wash their hair no more than two or three times per week.