Common marriage habit could quietly kill your sex life, expert warns

Sexual desire can change over the course of a marriage, particularly with age and major life changes — and research suggests certain lifestyle and relationship factors may also contribute to a lower libido. But changes in desire or frequency do not necessarily mean a couple’s sex life is unhealthy, according to experts. Dr. Anna Elton, a licensed marriage and family therapist and clinical sexologist in Massachusetts, said there is "no medically prescribed number that defines a healthy sex life."