Semen Retention: Should You Stop Ejaculating? - Science Vs Recap

Podcast: Science Vs

Published: 2025-10-23

Duration: 43 min

Guests: Seren Jair, Justin Dubin, Brent Hansen

Summary

The episode investigates the purported benefits of semen retention, examining claims about increased testosterone, improved mood, and sperm quality against scientific evidence.

What Happened

The episode begins with Wendy Zuckerman and comedian Seren Jair exploring the concept of semen retention, a practice where individuals refrain from ejaculating to purportedly conserve energy and enhance vitality. Historically, semen has been seen as powerful, with conflicting views on its retention across cultures and time periods. They delve into the internet phenomenon of semen retention communities, which liken the practice to a support group, where individuals share their struggles and perceived benefits, such as increased confidence and energy.

A key study discussed involved men abstaining from ejaculation for 20 days, after which they reported more intense orgasms but no significant changes in testosterone levels. This challenges the claim that semen retention boosts testosterone. Other research pointed out that while testosterone might get a small bump post-orgasm, it doesn't sustain long-term benefits from abstinence.

The episode also examines whether abstaining from ejaculation could improve mood or athletic performance. Historical anecdotes, like Muhammad Ali abstaining before fights, are contrasted with studies showing no improvement in athletic performance due to abstinence, except potentially when sexual activity occurs within two hours of an event.

Regarding sperm quality, the hosts discuss whether semen retention could enhance sperm count and quality. Although abstaining for a few days can increase sperm volume, prolonged abstinence might lead to DNA damage in sperm, suggesting a balance between frequency and sperm health is needed.

The episode addresses potential risks of prolonged abstinence, including its debated connection to prostate cancer, while emphasizing that guilt or shame induced by online communities can be harmful. Participants in these forums often report increased feelings of shame and worthlessness, contradicting the supposed mental health benefits of semen retention.

Finally, the hosts conclude that while there is no harm in practicing semen retention if it feels right for the individual, the scientific evidence does not support many of the claimed physiological benefits. They encourage listeners to approach the topic without guilt and to make personal choices based on their comfort and understanding.

Key Insights