“Sex is not the key to a happy marriage, but it’s a side effect. Although not every day!” she said in the interview. “If it’s every day, it loses its charm. It’s so important to maintain your chemistry. You have to continue to laugh, explore, have fun with each other and have romance. A good marriage, full of love, is my biggest accomplishment. Home is where my husband is. He is home. Everything outside of the family nucleus is an adventure that you’re living together.”
Hayek may have a point. According to a study published last November in Social Psychological and Personality Science, couples who have sex at least once a week are happier than couples who have sex less than once a week; conversely, couples who have sex more than once a week aren't necessarily happier than the couples only having sex once a week. Basically, having sex once a week seems to be the ideal number for the happiest couples. So maybe there’s something to this whole not having sex every day idea Hayek has.
Sex has been tied to better health. A 2009 study found that men who have sex two to three times a week are less at risk for developing heart disease than men who had sex less than once a week or once a month.
But Hayek’s argument isn’t that daily sex is necessarily bad for you, just that it could potentially kill the spark. Regardless, we think it’s fair to say that how often a couple has sex really does boil down to the couple. Once a week might be enough for some, but might not cut it for others.