FoMO is intrinsically linked to anxiety about missing a possible opportunity for sex, a spicy new study has confirmed. FoMO, an acronym popularized by author Patrick J. McGinnis in 2004, has become perceived as a 21st century phenomenon fueled by social media feeds that implore we remain constantly connected. However, the new study published in Current Research in Behavioral Sciences, found FoMO has far more ancient — and base — roots.