Studies show that the 4-5 year age gap provides the most stable relationship. Gaps more than 8 to 10 years show higher disillusionment, quarrels and disturbed interpersonal relationships, leading to separation and divorce Bigger age gaps might have worked well for some, but cannot generalise.

What happens if wife age is more than husband?

Marrying an older man shortens a womans lifespan, but having a younger husband reduces it even more, the study found. However, a woman who is between seven and nine years older than her husband has a 20% greater mortality rate than if she were with a man the same age.