Do You Need Sex Every Week for Good Mental Health? The Truth Behind the Viral Claim

A viral claim suggesting that people need sex every week for good mental health echoes real research, but goes further than the evidence allows. A 2025 study of 15,794 US adults found that people reporting sex once or twice a week had the lowest odds of depressive symptoms, but did not establish that everyone needs weekly sex.

Importantly, the study did not measure 'good mental health' as a whole. Its main outcome was depressive symptoms, so it cannot establish a recommended sexual frequency for overall psychological wellbeing.

What the Study Actually Found

The study, published in the Journal of Affective Disorders, analysed 15,794 US adults aged 20 to 59 who took part in the National Health and Nutrition Examination Survey (NHANES) between 2005 and 2016.

Compared with participants reporting sexual activity less than once a month, those reporting sex once a month but less than once a week had lower odds of depressive symptoms. The same was true for those reporting sex at least once a week.

An analysis suggested that 52 to 103 sexual encounters a year, or roughly one to two times a week, was the range associated with the lowest odds of depressive symptoms.

That finding may explain the viral interpretation, but it did not establish that everyone needs sex once or twice a week.

Why 'Optimal' Does Not Mean 'Necessary'

The researchers described one to two times a week as an 'optimal' frequency in their analysis, but that does not mean medically necessary.

'Optimal' describes the pattern observed in the analysis. It does not mean doctors have established a target people should meet.

The study was cross-sectional, meaning it examined existing data rather than following participants over time to establish causation. Relationship quality, physical health and stress could also influence both sexual activity and mental wellbeing.

The viral claim turns an observed association at a particular frequency into a universal recommendation that the study did not make.

What if You Rarely or Never Have Sex?

Having little or no sex does not automatically mean someone has poor mental health.

The 2025 study cannot establish that having sex less frequently causes depression. Sexual frequency can vary because of relationships, personal preferences, life circumstances and other factors.

A separate analysis of 6,061 women aged 20 to 59 found that those reporting 11 or fewer sexual encounters a year had higher odds of depression than those reporting more than 11. However, that study was also cross-sectional and could not establish causation. Researchers said the association may be bidirectional.

Sex and Intimacy May Affect Wellbeing

Frequency may not tell the whole story. A daily diary study involving 152 adults over 21 days found that sexual activity on one day was associated with greater wellbeing the following day.

Greater sexual pleasure and intimacy were also associated with more positive and less negative affect. The findings suggest that the potential link with wellbeing may involve more than simply how often someone has sex.

The study does not establish that sex improves mental health or should be used as a treatment.

Mental Health Can Affect Your Sex Life Too

The relationship may also work in the opposite direction. Research has linked depression and psychological distress with changes in sexual interest and functioning, meaning lower sexual activity may sometimes reflect an existing mental health difficulty rather than cause it.

Taken together, the research supports an association between sexual activity, intimacy and aspects of wellbeing, but does not establish that everyone needs sex every week.

The research does not show that weekly sex is a requirement for good mental health.