When you discuss this with your wife, you could maybe talk about setting in place some sort of hair cycle. My SO shaves fall and winter, and grows it spring and summer. Other CDs with wives shave a week a month. If you talk to your wife about what any concerns might be (stubble burns, prickly in bed, feeling that it's too permanent looking) and come with some compromises already thought out, and truly listen to her side, it might be an easier conversation.