Ancient Egyptian Pharaohs: The pharaohes who would practice public masturbation
According to Sex and Society, "even the ebb and flow of the Nile was thought to be caused by Atum's (the god of creation) ejaculation. This concept spurred the Egyptian pharaohs to ritually masturbate into the Nile to ensure an abundance of water."
The ancient Egyptians were so inspired by the act of self-stimulation that at the festival of the god Min, who represented Pharaoh's sexual potency, men masturbated in public.