A good first step is to have a rule of no phones in bed, or if you can’t get there immediately, no phones after a certain time. You need to look at her with love and speak to her in a loving tone. During the day, you can email or text her loving and sweet things, and you can add in sexual things once it has been established that you have a fun and loving back-and-forth daily correspondence. If you focus on your wife and making her feel loved and secure, and you outright broach the idea of your b