I am going out on a limb here but do you watch a lot of porn. It made me think of the
thread by MrFriendly. I do think that we have all been affected by Porn, it skewers are vision, changes our fantasies.
You are not going to change your wife, it is something you have to realize and accept. Then you have to evaluate yourself what you want, and consider where this desire stems from. I do not know if porn is part of the issue here, but I do wonder. Either way you have a choice but if you continue to push it, do not be surprised when this becomes a major issue in your marriage.