Educate your wife about what it’s like to be a visually-wired man in a visually tempting world.
To educate her you might have to get out of your comfort zone. Explain that you want her to understand how you see the world, and ask if it’s something she wants to know about you. Most women do, but, frankly, some women aren’t sure. Your visual nature is so foreign to women (since our wiring is so different) that it can sometimes be intimidating for a woman to hear. But that usually goes away as long as you make it clear that you want to talk about it because you want to increase the closeness between you and you want her to understand what it is like to be you every day.
If she says she wants to understand that, then tell her what it’s like to be a visual guy today, and how often you see things that you don’t want to have to see. Tell her how much you delight in seeing her, rather than the other images out there. In fact, it might help to take a look—together—at the chapter in Through A Man’s Eyes that explains how the male brain is actually physically wired differently from her brain as a woman.