When and why did masturbation evolve in primates?
Skip to conte Low-ranking male Japanese macaques (Macaca fuscata) masturbate more frequently than dominant males to ensure their sperm are fresh and healthy when they …
- The Great Pretender
Skip to conte Low-ranking male Japanese macaques (Macaca fuscata) masturbate more frequently than dominant males to ensure their sperm are fresh and healthy when they …