Next to each hair is a sebaceous gland which secrete sebum which lubricates the hair and provides each hair with an element of protection. If the sebaceous glands are overactive greasy or oily hair will result. If the glands are underactive dry hair may result including breakage.
Daily Hair Tip
The advantages of having hair cut when wet is that it is easier to control, is free of styling substances which impact hair's movement & makes natural head shape more visible.