In different dimensions
The absence of joint actions and mutual interests becomes a sign of the flow of love into a habit of being together. Otherwise, the interests do not overlap, and only the way of life is the link between the partners. Each of the spouses has its own world, where there is no access to the other, and the spouse refuses to understand it.
It becomes clear that it is easier to separate, than with a person who does not accept the interests of his or her pair. Gradually, the need for communication disappears and becomes a burden.
Partners avoid tactile contact, for example, kissing, hugging and just touching. In the intimate sphere, sexual contacts become boring or simply drain to "no." Minimal tactile contact becomes a sign that relations are not only not developing, but are rapidly moving towards extinction.