Impulse Control with ADD?

Has anyone experienced impulse control with their ADD spouse? My husband and I have very different libidos, and due to our conflicts in marraige, don't always have as much intimacy as he would like. That being said, almost everytime I've gone away on a business trip, I come home to find he's been trolling on adult-only sites of any given variety... he keeps telling me it's the ADD and he can't help himself when I'm not there to temper the urge to "go look". I'm calling this BS... He says the disorder limits his impulse control and I should just not get so upset about it... anyone?