Is it wrong for me to be upset with my husband becasue he looks a dirty magazines.

He says it is natural and he is not out cheating that it is just a magazine, but I feel that he has me to take care of his needs and I am more than willing to be with him any time he wants. I don't see why he has to look at the magzines when we have a prefectly healthy relationship. It bothers me that he gets him self excited over pictures of other women. Am I being sily??