Seminal emission is the ejaculation or flow of semen that does not occur from the side when there is no sexual intercourse. Semen is usually more abundant, about 2-7 ml, milky white with a peculiar slate-flower smell. In contrast, what these patients call seminal emission is a small amount of egg-white-like mucus flowing from the urethra after penile erection, usually only a few drops. It is colorless and transparent and can be pulled out in long strands. This fluid is actually not semen, but urethral bulb gland secretion. When men are sexually aroused, they are secreted to lubricate the urethra and prepare for ejaculation. Most people don’t notice this phenomenon because the amount of secretion is so small. And when a patient has a male disease, such as prostatitis or sexual dysfunction, they are more concerned about their own reaction and are more likely to notice this small detail that is overlooked by other people. The result is mistaken for seminal emission, causing unnecessary panic.