The average couple has sex 60 times per year, or once per week, according to famed sexual therapist Barry McCarthy. Many couples have sex more frequent than weekly, and many couples have sex less than weekly. It is important that each couple identify what is the healthiest sexual frequency for them. Further, one should know how much their partner desires sex in general.
In general, both men and women both report physical intimacy to be an important part of a relationship. Sexual intercourse is one aspect of physical intimacy.
It is also common that couples will go through periods of infrequent sex. A couples becomes a sexless couple when a period of infrequent sex lasts a year or longer.