Experts who spoke with BBC Worklife also had varying ideas. New York City-based sex therapist Stephen Snyder says, “I usually think of ‘sexless’ as four times a year or less,” unless that couple is “having sex quarterly and they both say it"s awesome”. Kimberly Anderson, sex therapist and assistant professor of psychiatry at UCLA"s School of Medicine, puts the rate of a ‘low-sex’ marriage at fewer than 25 times per year. Others say the definition is purely subjective; if a couple is unhappy with the frequency at which they’re having sex, there’s a problem worth addressing.