It is really difficult for a woman to tolerate her man watching porn. But watching porn is sometime a habit and does not prove that he is avoiding his wife. But when it comes to legal relationship called marriage, each partner has feeling of possessiveness to each other and if any one of them indulge in to Porn watching, the other will not like it and feel ignored about his or her urge. And it is not male, but female partner could have such habit! So it is definitely interfere with Marriage, but one need to understand that talking to each other about the matter and choices is the solution, and the porn is mostly the fantasy of other man or woman depicted in to Picture or Video. And the spread of Internet technology is spreading it beyond the boundary. So people all across the world should oppose the spread of Porn material by individual and professional both. I firmly believe that all these things are personal. One should not spread it to mass. Because some time some one by mistake willingly or unwillingly stuck in to such habit and later on it is very difficult to get ride of it even though he or she is not unhappy with his or her spouse.