If a man is forty-seven years old and has no occasional sexual demand, it is a normal phenomenon; if there is no sexual demand for a long time, it indicates that there is an abnormal situation may be, may be related to psychological factors, high blood pressure or diabetes, prostatitis and other factors. 1. Normal phenomenon: forty-seven-year-old men in the work and life of the body overworked, often late at night, the body is too tired, will occasionally have no sexual requirements, is a normal performance, do not have to worry too much. 2. Psychological factors: men’s psychological pressure is too large, the relationship between husband and wife is not harmonious, will have an impact on the male libido, may lead to decreased libido, no sexual demand, and lasts for a long time. 3. High blood pressure, diabetes: Men who suffer from high blood pressure or diabetes for a long time may lead to insufficient blood supply to the cavernous body of the penis, resulting in erectile dysfunction, which will cause men to have no sexual desire as well as sexual demand. 4. prostatitis: may be related to poor hygiene, bad habits and other factors, when prostatitis aggravated, it will lead to decreased libido, may also appear erectile dysfunction, premature ejaculation and other abnormal performance. The fact that a man is forty-seven years old and has no sexual desire for a long time indicates that there is an abnormal situation, and it is recommended that you go to a regular hospital for examination and treatment.