The glans hardens with mucus in the glans is usually not sperm, but prostate fluid. Normally, the mucus that appears on the glans after erection is generally prostate fluid caused by sexual excitement, and it is normal to have this secretion. Usually prostate fluid does not contain sperm, or only a small amount of sperm, but this situation is relatively rare, so the mucus on the glans is usually not sperm. Sperm is usually ejaculated with the semen, which is usually 2-6 ml per time, and is clear and grayish-white in color. The normal number of spermatozoa per milliliter of semen is over 15 million. Prostate fluid is also a part of semen, and the nutrients in it can provide sustenance for the sperm. Prostate fluid also contains liquefaction factors that can thin the semen and promote the combination of sperm and egg. To summarize, if you feel unwell, please seek medical attention.