"In addition, those with steady partners are having sex less frequently".
That benefit is steadily diminishing, according to a study released Tuesday.
"In the 1990s, married people had sex more times per year than never-married people, but by the mid-2000s that reversed, with the never-married having more sex", Twenge said.
One factor is the higher percentage now of unpartnered people, who tend to have less sex than partnered ones. "Indeed, the so-called "partnered advantage" in sexual frequency has been rapidly diminishing in recent years".
The researchers also found, that older adults are having sex less frequently than younger adults.
"If you're going to make any argument for how the bias in response would change over time, I would expect it be people being more open to say they had more sex", Twenge said.
Back in 1990, married Americans would have sex about 73 times a year. For each year after the age of 25, adults had sex 1.18 fewer times on average. "DVRs became more common right around that time, too".
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Compared to 1986 when 66 percent of Americans were living with a partner, only 59 percent live with a partner in 2014. "Data from Britain's Natsal studies suggest that this is the case for the vast majority of people, with only a minority reporting that they were dissatisfied with their sex lives".
A new study from San Diego State University and Widener University has found that adults, on average, are having sex seven times fewer annually than adults were in the early 1990s, and nine times fewer then adults in the late 1990s.
The ubiquity of electronic distraction does not help, she added. And there's been a far, far bigger drop in the amount of sex people have if they have at least two years of college education, which correlates with those who tend to get married later in life. "This is certainly novel and surprising to me", Dr. Sherman says.
And as for gender: The decline in sex was about evenly split among men and women.
They explained how extreme access to social media entertainment, more depression rates (associated with antidepressant consumption and erectile dysfunction) and an overall diminishment of happiness among people age 30 and over could reverberate in the rates presented in the study.
Here's the researchers' basic proposition: All other things being equal, married people have sex more often than unmarried people. The decline was largest among white people, married people, those in their 50s, those with a college degree, those with children between ages 6 and 12 at home, and those who had not seen a pornographic movie in the past year. "It was less pronounced among younger people, men, nonwhites, people with children under 6, people in the West".