Sperm is the “source” of life, and without its participation, the conception of life would be a pipe dream. However, the “function” of sperm is not only limited to breeding life, men can observe or check the various states of sperm in their daily lives, and thus “peek” at some “private” aspects of male reproductive health. The “private” information can be found by observing or checking the status of the sperm in daily life. The red color may be internal bleeding The color of normal male sperm should be milky white or off-white. The change in color may indicate the presence of certain reproductive health conditions, so men’s health experts say that men can avoid possible health risks by observing the color of semen on a daily basis. It is worth noting that men should pay attention when observing semen color on their own. It is best to use a transparent, light-colored condom during sex, and when the ejaculation process is complete, wipe off the mucus outside the condom with paper, and then place the condom body on white paper to observe the color. If the semen is light red, red, red-brown, etc., or even contains blood, blood clots, this is an obvious blood sperm condition. If the blood sperm is not due to too intense sex when the couple reunites after a long time, and the male reproductive system has not been traumatized in the short term, we should consider some other pathologies of the reproductive system, such as bleeding from the seminal glands, prostatitis, etc., at this time need to go to the hospital for timely treatment. The smell of normal semen is emitted by a chemical substance called sperm ammonia after oxidation, much like the smell of chestnut flowers. The lack of this particular odor in semen often indicates that prostate function is impaired. In addition, some men smell bad or even foul after ejaculation, which is most likely due to inflammation of the genitourinary system or other genitourinary system diseases, and should go to the hospital for examination in time to avoid delaying the condition.