People have been having less sex, even before COVID-19. Why?

A new study published in the Archives of Sexual Behavior shows a marked decline in the sexual activity of people aged 14 and 49 between 2009 and 2018. What gives? Scientific American asked the scientific paper's lead authors—professor Debby Herbenick and research associate Tsung-chieh (Jane) Fu of the Indiana University School of Public Health–Bloomington. — Read the rest