Differences in libidos are common among couples of all ages .
性欲上的差异在所有年龄段的夫妇之间都是普遍存在的。
But there some ingenious business people are using raging libidos to make them money .
但是，一些有创意的商人正在利用人们狂热的性欲为自己赚钱。
People who take anti-depressants like prozac and zoloft , drugs which increases serotonin in the brain , often have lower libidos .
服用像百忧解和舍曲林这样的抗抑郁药会增加大脑中血清素的含量，从而可能导致降低性欲。
An alternative view of the matter is that the key variable is not the libidos of the politicians but the vigilance of the agencies , public and private , that keep a squinty eye on them .
