When and why did masturbation evolve in primates? A new study provides clues
In a first-of-its-kind comparative study, researchers show that primates were masturbating 40 million years ago and that the behavior may help males keep their sperm fresh.
Lateefah Roth Proceedings Of The Royal Society Matilda Brindle Of University College London Institute Of Forensic Psychiatry University Of Duisburg Sex Research
Source: sciencenews.org