Women have the advantage when they are the passengers of a drowning ship. Sadly, it's not the case in medical science in some cases.
Modern lifestyle and medical practice have led to a dramatic rise in the amount of people suffering from sexual dysfunction. Men have received a rather effective drug to deal with this problem - Viagra. To keep simple stuff simple: basically, Viagra is a drug that helps men feel manly (by having a strong erection). It has been declared to be a miracle for men, since it helps almost anyone get their sex drive back, at least for a short time (usually enough to have a satisfying experience with your partner). Viagra is a top-seller since the very day it has been invented, given that it is unique to the market and the importance of matter it fixes. It was first meant as a cure against angina pectoris, but in the course of development a great side effect was discovered which quickly replaced the intended one. Millions of men (and women) owe their sexual life to this wonderful "side effect".
Still women seem to be deprived of such miraculous cure. Male and female genitals function in different ways, thus you can not just suggest Viagra to treat all the women, though some experiments have been conducted. During one experiment the test subjects (women suffering from sexual dysfunction) were divided into two groups. One group was treated with Viagra, the other - with Placebo pills. The "success rate" for the first group was a bit higher; a higher percent of experimental women reported feeling strong sexual arousal among those who received Viagra, than those who received Placebo pills. Also, all the women that received Viagra said that their lubrication function has greatly increased. Thus it was concluded that Viagra has little effect on sexual arousal, but has a very big effect on vaginal secretions.
Another trouble is that there aren't any distinct criteria about how to evaluate results of treatment with Viagra when it comes to female sexual dysfunction. The only information you can be sure of is if there is sexual arousal or not. Female organism is far more complicated than male, thus many more parameters should be taken into account, such as blood flow.
The problem actually lies not in the field of medical science. An analogue of Viagra for women can and will be invented. Doctors are not recommended but are allowed to proscribe Viagra to women, since practice has shown that women take Viagra to increase the quality of their sexual life and it has been proved that sometimes Viagra does help women. The attitude to the problem is the main reason behind such discrimination. There hasn't been much attention for the fact that women suffer from sexual arousal disorder. Men have been seeking the opportunity to resurrect their sexual life for many centuries, whilst women got equal rights with men just half a century ago. There were not many doctors or medical scientists among women in Europe for quiet a long time and religion did a lot to prevent some medical studies (as well as prohibiting a lot of aspects of sexual life). Now females are striving to receive all the benefits of modern science and hopefully they will.