How do you get back intimacy in marriage after 40 years>?

Several ways: Spend time together. Find things you both enjoy doing, and do them together. This will provide a bridge back to relating to each other more deeply. Find things you appreciate about each other, and tell each other. Laugh together -- this dispels a lot of discomfort, and is a natural relationship builder. You can also see a marital therapist to work on longstanding issues that might need help.

By communicating : You should communicate your desire to get intimacy back in your marriage. Beginning a conversation with your spouse or partner to see if he feels the same desire would be a first step. The next step is brainstorming how you can do that. If you need help, contact a couple or sex therapist and commit to working on improving intimacy.