Why do taken men look at naked women?

Mina

My ex used to was a porn addict, he told me the reason why men watches porn, and other women, is because men wants a variety. And they get bored of their own woman. He said there will always be someone prettier than me. FAst forward to 2 yrs, im in a new relationship, to find out hes a porn addict too, and loves to look at women online. I ask him why men do that when they already have a woman in their life. And all he said was, what did your ex tell you? You should already know with his answer. Not mine.