I was surprised it was only once a week, I would have said twice but, there is only one Saturday night a week: More Sex Is Better, But Only Up To A Point http://www.huffingtonpost.com/entry/daily-sex-challenge-how-much-sex_564be1a6e4b08cda348b7497 The final study, which included data from a 14-year study of 2,400 married couples, again found that sex was linked to higher levels of satisfaction with the relationship, but only until they had sex about once a week.