It can be an addiction as well. I have noticed with my recent masturbation it has lead me to pursue internet dating and finding other people, to experience intimacy with. I am not married, but I have been isolated for a long time and so maybe that is why God made us have this biological function but at the same time it must be controlled, but it shouldn't be a problem for you, especially if you are married and she is understanding or doesn't feel unattractive because of it. It's something you need to do. The religious and saintly side is to be chaste, and I have tried that too, but it makes you numb. I think it is healthier just to let it be as it is.