Semen has no effect on a woman; its main purpose is to enter her vagina, where sperm and egg combine to form a fertilized egg and cause her to become pregnant. Semen is a mixture of fluids whose main components are sperm as well as seminal plasma. Sperm is produced by the testes, matures in the epididymis, is discharged through the vas deferens after ejaculation, and combines with the female egg outside the body to form a fertilized egg, which is the basic condition for a woman to give birth, so the role of semen for women is to promote pregnancy and childbirth. Seminal plasma accounts for more than 90% of the volume of semen, and the main components are prostate fluid, seminal vesicle fluid and urethral bulbourethral fluid, etc. These substances provide nutrients and energy for the growth and activity of sperms, which is also an important factor to ensure that the fertilized egg is formed. Men’s semen has no other special effect on women, so it must be disposed of with care.