(CNN)Young Americans are having less sex -- and they can't even blame the coronavirus pandemic for this one.
Sexual inactivity increased among young American men between 2000 and 2018, according to researchers from Indiana University and Sweden's Karolinska Institutet who studied survey data from US adults. Postponement of adulthood and the growth of the internet and digital media could be reasons for why.
Researchers analyzed data looking at sexual frequency and number of sexual partners, looking at responses supplied by more than 4,000 men and 5,000 women for each question.
Men who were unemployed, had part-time employment or lower incomes were more likely to be sexually inactive, researchers found, noting that the percentage of sexually inactive 18- to 24 year-old men increased from 18.9% between 2000 and 2002 to 30.9% between 2016 and 2018.
Women aged 25 to 34 were also having less sex, researchers said in an investigation published Friday in the medical journal JAMA Network Open, pointing out that students were most likely to be affected.
The reasons for this downturn are complicated, researchers said.