Men sleepy after coitus is generally a normal physiological phenomenon, may be more frequent coitus, excessive fatigue, stress and other reasons. In the same room, generally men in a dominant position, if the number of times too frequent, will make the consumption of a large number of men’s physical strength, in the same room after the phenomenon may appear sleepy. In the process of sexual intercourse, attention will be highly concentrated, easy to make the body fatigue, or life, work pressure, long-term stay up late, resulting in long-term sleep deprivation, may also appear after the phenomenon of sleepiness. In addition, the man’s greater stimulation during intercourse, may quickly reach orgasm, and after ejaculation, physiological and mental will appear suddenly relaxed, into the inhibition of the sexual response, thus appearing fatigue, the phenomenon of sleepiness. However, if the symptoms of sleepiness or fatigue often occur after intercourse, consider that it is caused by disease, you should go to the regular hospital to consult the examination, to clarify the cause of the disease, so as not to affect the health of the body.