Is it normal to watch porn movies after getting married?

Hi ,i am in trouble ,i get married almost five years before.i have a child and very loving and caring wife, but i still like to watch porn movies too much,i dont know why,i try to keep myself away from porn movies ,but not more than one week.i do masturbation and ejaculate almost four times in one sitting.i want to get rid of this stupid habbit,please help me...