In news that will be no surprise to more than half the population (ie every men, plus many women) a recent study has identified that having more sex leads to happier marriages. Here is an extract from an article on the subject
Q. Are couples in sexless marriages less happy than couples having sex?
A. Generally, yes. There is a feedback relationship in most couples between happiness and having sex. Happy couples have more sex, and the more sex a couple has, the happier they report being. But keep in mind that sex is only one form of intimacy, and that some couples are fairly happy (and intimate) even without sex. In my 1993 study, I did find that people in sexless marriages were more likely to have considered divorce than those in sexually active marriages. There is no ideal level of sexual activity — the ideal level is what both partners are happy with — and when one (or both) are unhappy, then you can have marital problems. READ MORE