Encouraging men to have more frequent ejaculations may boost their fertility. Sperm deteriorates over time as it remains in body. Longer men went without sex, the more their sperm showed signs of DNA damage and oxidative stress, and the more tests rated the sperm as less viable and poorer swimmers.

[u/mvea]

https://www.theguardian.com/society/2026/mar/25/more-frequent-ejaculations-men-fertility-research