"What was this? a wet sticky spot on my bed?"

"Atum, the creator of life
According to an ancient Egyptian myth, the creator god Atum, being alone in the world, stimulated his penis and swallowed his own semen. By spitting it out again, he produced the first female and the first male."
"Male masturbation became an even more important image in ancient Egypt: when performed by a god it could be considered a creative or magical act: the god Atum was believed to have created the universe by masturbating to ejaculation, and the ebb and flow of the Nile was attributed to the frequency of his ejaculations. Egyptian Pharaohs, in response to this, were at one time required to masturbate ceremonially into the Nile" ." -wiki


"The word masturbation is believed to derive from either the Greek dialect word mézea (μέζεα, "genitals") or the Latin manus ("hand") and the Latin turbare ("to disturb"). A competing etymology based on the Latin manu stuprare ("to defile with the hand") is said by the Oxford English Dictionary to be an "old conjecture"- wiki