许多４０岁以上的中年人突然间感到自己的性欲减弱或消失，为此，他们陷入了深深的苦恼之中。这种情况如处理不好，会造成恶性循环，贻害无穷。虽然性欲也受血液中的激素水平和躯体状况的影响，但性欲消失主要是一种恐惧心理，而不是由疾病引起。通过对性历史的调查不难作出判 Many middle-aged people over the age of 40 suddenly feel their sexuality weakened or disappeared, for which they fell into deep distress. If this situation is not handled well, it will create a vicious circle and end up with untold hardships. Although libido is also affected by hormonal levels in the blood and body conditions, the loss of libido is primarily a form of fear, not disease. Through the investigation of sexual history is not difficult to make a sentence