I think someone should do research on whether regular masturbators live longer than non-masturbators. I believe we do and here's my theory: if you look at the animal kingdom, those animals that reproduce early tend to die early too. It seems that their job on earth is done after they've reproduced. Those that have offsprings later must live longer to find a mate and reproduce. While they're trying to find a mate, they masturbate (all animals except maybe insects or reptiles have been observed masturbating) which produces good-feeling chemicals that help them stay alive that much longer and reproduce.
Masturbation certainly produces a healthy glow!