While most married men view porn you may directly contribute to your husband viewing it more by neglecting your physical appearance. If you gain an excessive amount of weight or fail to properly groom yourself or wear nice clothes your husband may look more to porn than he normally would for the feminine beauty that he is naturally designed to crave.
Even if you take great care about your physical appearance if you are harsh, critical, disrespectful or less than fully receptive to your husband’s sexual advances he may view more porn than he would have otherwise. Most women fail to realize that men do not view porn only because of the bodies of these women or the sex acts themselves. Many men also view porn because of the enthusiasm these women show toward sexually pleasing the man they are with.
Even if you as a Christian wife take great care of your appearance and you willingly and enthusiastically have great sex with your husband he may still look at porn. I refer you back to hard truth number 2 about men and their sexuality men are designed by God with a capacity for polygyny. So this means even if your husband is thrilled with you in all these areas he will still be drawn to enjoy the view of a variety of women’s bodies.
Even if you deny most or all of the hard truths I have just stated the Bible nowhere gives you the right to deny you husband sex because is he doing something sinful. Remember that the same Bible which you believe says men viewing any kind of porn or thinking sexual thoughts of other women is wrong also says very clearly that a woman may not deny her husband sexually.
Even if you deny most or all of the hard truths I have just stated your husband is NOT accountable to you for his thought life or his actions. Even if you feel he is being disobedient to God in his porn use you are not his spiritual authority and you have no authority to confront him in this spiritual matter.