1, emotional problems. The outside world is wonderful, and the opposite sex outside is more lovely. How many married men and women live in the besieged city and fly out of the city. Husband and wife can't laugh at home on weekdays, complaining about this and that, but not complaining about their incompetence. Or the cold war. In this case, the husband and wife unilaterally ask for separate beds, indicating that there is something wrong with their feelings and her (his) heart has gradually moved away. Being alone is to give yourself a space to fly freely.
2, unable to communicate smoothly. Dislike each other. Some couples have different education levels and different outlook on life and values. Go to work during the day, stay behind, stay together at night, and start quarreling without saying a few words. You don't like me, and I don't like you. We dislike each other. Two people seem to be arguing. After a hard day's work, they had to suffer like frying pans. Why bother? Living apart is to avoid an escalation of the war. It means that you can't communicate smoothly and you can't do anything about your marital status.