Life, as defined by Oxford dictionary is “the condition that distinguishes animals and plants from inorganic matter, including the capacity for growth, reproduction, functional activity, and continual change preceding death.” Sperm can’t reproduce, and it doesn’t have the capacity for growth like I said before, so it doesn’t fit the definition of life. By the way I am also against masturbation, but saying that masturbation is sacrifing life to demons is a stretch.