Couples want to know what is "healthy. Either way, it's a legitimate concern that can easily lead to stress, anxiety, depression, self-esteem issues and even the end of an otherwise successful relationship. A quick online search will bring up a huge volume of statistics -- most of them not scientifically generated -- regarding the frequency of sex among long-term, committed couples. The numbers presented in these "studies" vary widely, depending on the source and what the author is trying to promote. So in this instance, Google, Yahoo, Bing and similar search engines are somewhat useless.