They also have children later, so parenting takes up more of the evening hours that might have been devoted to intimacy.But she notes that frequency of sex declined sharply for both married and unmarried people starting in 2008, when electronic devices began to take more of people's time.Twenty other charges for similar offences were taken into consideration during sentencing.

In short, Americans could have less sex because they’re spending their nights watching Netflix and scrolling through Facebook. “Look around you — people out to dinner often seem more interested in the box in front of them than in the person across from them,” Regnerus wrote in an email to “Of course sex will suffer under such circumstances.” The study has some limitations.

The researchers analyzed data from the General Social Survey, a nationwide survey of adult Americans that is nationally representative, and therefore mostly applies to heterosexual people.

On Feb 13, Robinson, who used to be a senior visual effects artist, pleaded guilty to four counts of making obscene films and three counts of having consensual sex with minors.

He also admitted to one count each of being in possession of obscene films and exhibiting an obscene object to a child.

The study points to some possible culprits, like a decline in happiness in people over 30 that was found in another study by two of the same authors.

But another reason might be tied to cultural changes that have happened in the past 20 years — namely, the rise of social media and video streaming, the authors speculate.

He met his second victim, who was also 15 years old, on June 23, 2015 and they went to his home where they had unprotected sexual intercourse. When she left his apartment, the court heard she broke into tears, had a “mental breakdown” and told her parents, who alerted the police.

Two days later, officers seized his computer and portable hard drive where they found 5,902 obscene films.

If it seems your sex life isn't what it once was, you're not alone. The study "Declines in Sexual Frequency among American Adults, 1989–2014" was published in the Archives of Sexual Behavior.