With all that follows. Where it falls mandrakes grow.
Does semen really glow in the dark?
Sort of. Semen won’t give off light like a glow-in-the-dark sticker, but it does fluoresce. In other words, it absorbs ultraviolet light and re-emits that energy as visible light. The same holds for many organic substances, and most bodily fluids—including sweat, saliva, and urine—will shine when you put them under an ultraviolet “black light.” Semen happens to glow the brightest, however, on account of the particular mix of chemicals it contains.
Semen is primarily water, but contains trace amounts of almost every nutrient the human body uses. It has somewhat higher amounts of commonly deficient minerals, such as potassium, magnesium, and selenium. One typical ejaculation contains 150 mg of protein, 11 mg of carbohydrates, 6 mg fat, 3 mg cholesterol, 7% US RDA potassium and 3% US RDA copper and zinc.
