Sperm spots are spots formed by the secretions of ejaculate or effluent prostate fluid sticking to the underwear or bedding that appear after a sexually stimulating situation, and are traces formed after the semen dries up. Semen is the fluid ejected through the urethra after a normal male sexual climax or wet dream. The components of semen are mainly the fluid of the seminal vesicle glands, prostate fluid and spermatozoa. The components include 1/3 prostate fluid, 2/3 seminal vesicle fluid, and spermatozoa only account for a small portion of the semen. Sperm stains on underwear or bedding is a normal phenomenon, it is a white or yellowish solid secretion formed after drying of semen discharged through the urethra in normal men after dreaming or having sex. To summarize, if a man has several episodes of wet dreams in a month or finds semen stains on his underwear or bedding several times, he should go to a regular hospital in time to avoid delaying his condition.