One of the most comprehensive studies on the subject, which was released in 2010 by the Center for Sexual Health Promotion at Indiana University, confirmed this, compiling statistics on sexual attitudes and habits of 5,865 people between ages 14 and 94. An average of 61 percent of singles reported that they hadn’t had sex within the past year, compared with 18 percent of married people. Looking specifically at those between the ages of 25 and 59, 25 percent of married people reported that they were still having sex two to three times per week versus less than five percent of singles.
Yet, while Indiana University’s data is often cited as evidence that married sex can be hot – way hotter than single, anonymous, no-strings-attached sex, thankyouverymuch -- it doesn’t really reflect the shift that individual married couples notice in their sex lives as the years pass, nor the anxiety that this change can trigger.
Unfortunately, there isn’t conclusive statistical data comparing the frequency of couples’ sex while they’re dating to the frequency of their sex as a married couple. However, it doesn’t take a scientist to understand that, as time passes, their sex lives will take a hit.