After sex, it is not recommended to take a bath, because there will be a rise in body temperature during sex, if you take a bath, it will cause a rapid decrease in body temperature, if the water temperature is cold, it will cause vasoconstriction, there will be a decrease in resistance, which will cause the symptoms of a cold. Bathing after sex, even if the water temperature is relatively high, is not recommended, because there will be vasodilation, and then bathing with hot water will accelerate the expansion of blood vessels, will cause dizziness, and may even fainting situation. This time as far as possible first not to take a bath, half an hour or an hour after the bath, and so the body temperature back to normal, is not affected by health, you can first wash the genitals of both sides to avoid the occurrence of cross-infection.