During a professional training at Lahore, I attended a workshop on stress management. Two very senior psychiatrists conducted the workshop. They circulated a slip each to all the participants. They asked us to write down the most stressful thing in our life. Without any exception, all male participants wrote "wife" ... the discussion deviated from "stress management" and headed for "mian biwi stuff".
According to those two senior psychiatrists, annual love loss between a couple is 30%.
In little over three years, the love and romance is gone. Kids are a good glue for couple to hang on together. Those who decide to delay having kids, they face centrifugal tendencies more than others. The couple has to innovate things in their lives in order to keep the relationship alive