Once a week seems to be the average frequency among established couples, says study author Amy Muise, Ph.D., of the University of Toronto Mississauga. So it’s possible that people may feel happiest when they think they’re hitting that benchmark, she says.
“People may also feel this is enough to maintain their intimate connection with their partner,” says Muise.
Now, there isn’t much science behind this study, as the participants simply reported their satisfaction.
Bottom line: While you may want to have more sex, having it a few times a week isn’t going to make you any happier with your life—or with your partner—than if you did it once a week.
So if your schedules make it hard to get busy more than once a week, you don’t need to feel like you’re dooming your relationship.
“It’s not necessary, on average, for couples to aim to engage in sex as frequently as possible,” she says
Source: Men’s Health