The requirement for hair is very simple, that is, it should be clean and refreshing. But many careless men always ignore this. They may comb their hair, put on their favorite clothes and shine their shoes before going out or dating. I forgot that my hair may have been washed for three days, and it is becoming wisps with some dandruff hidden on it. If I get close enough, I can smell indecent hair oil ... men had better trim their hair once every half month and keep their hair style.