Make a commitment to pick a time and try it for a two-week period, then evaluate the effects. We're just plain lazy. Making the commitment in writing can help overcome the inertia of old behavior patterns. You never will experience the joy of shared prayer unless you do it. I don't feel safe with my partner.
Some couples are afraid of praying together, especially praying out loud.
Prayer is so personal and revealing and can be difficult letting even your spouse get that close to you. Shared prayer is worth the risk and can enhance marital intimacy. We have too much conflict in our marriage. Don't try to use prayer for preaching at your spouse. Instead, use it as a tool to bring your marriage into line with God's will.