Men should take precautions after coitus including not to take a cold shower, not to drink cold water, and need to clean the private parts. 1. Can not take a cool bath: after men have intercourse, they will discharge a lot of sweat, and sticky sweat in the body always makes people feel very uncomfortable. In addition, the body is still very hot after intercourse, so you want to take a shower. However, due to the strenuous exercise of coitus, if you take a bath immediately, it will cause panic and other situations. If you take a cold shower, it will make the blood vessels of the skin contract and let a lot of blood flow back to the heart, which will increase the burden on the heart. 2. Can not drink cold water: because men will consume a lot of physical strength after coitus, the heart rate will beat faster, and breathing will be faster. At this time, the gastrointestinal tract will also be inhibited, so the blood supply will be reduced. If you drink cold water immediately at this time, the gastrointestinal mucosa will be affected by the cold, which will cause discomfort and damage the digestive system. Therefore, after coitus, men should not drink water immediately. If you are thirsty, you can drink a moderate amount of warm water. 3. Clean the private parts after coitus: men need to clean the penis after coitus, and after cleaning, they should wear clean clothes to isolate the bacteria. There are many precautions that a man should take after coitus, and it is recommended to go to the hospital in time if you have any discomfort after coitus.