Aggression among animals is closely tied to the privilege of mating with the opposite sex. Males tend to fight one another for the domination of their herd or harem, which then seems to become part of their territorial possessions. It is no accident that in many cultures wives are regarded as part of the personal property of men. The winners of fights among prehistoric males are said to have superior genes, that can then be past on to their progeny. Thus the remark that some men tend to be more possessive and aggressive then women may well be a genetic feature of our ancestry. The production of testosterone - also associated with aggression and the hormonal source of the sexual drive - is greater in men then in women. Males have plasma concentrations of testosterone amounting to 10-30 nmol/L (290-860 ng/100 ml), whereas females have 0.8-2.8 nmol/L (23-81ng/100 ml)6 . Males have on average 13 times more testosterone floating around in their blood. Thus men have a greater sex drive than women. One client reported to me that he felt constantly on heat. On the other hand, it has been claimed by some that a few women can live happily without any sexual activities. Studying the testosterone or other hormonal levels it must be realised that we are dealing with bell-shaped averages; some individuals (male or female) showing extremes at either ends of the distribution of measurements and some overlapping. Looking at the ancient animal kingdom, we observe that males, lording it over the herd, tend to be promiscuous as opposed to females who tend to be monogamous. This is still very apparent among human behaviour where we see males inclined to be promiscuous compared to females. This is also evident in human male homosexual relationships, where these sex characteristics may be even more pronounced. The majority of clients of prostitutes are said to be married men, thus providing an outlet for some of the males promiscuous needs.7 Many psychological surveys have reported that there are vast differences in the perception, emotional and sexual reactions among human males and females, in regard to masturbation, extramarital sex or sexual fantasies. This has created according to some researchers the concept of a separate male and female cultures of beliefs, attitudes and expectations in man/woman relationships. 8 Christina A Clarke writes: “Previous research has also shown that women, more so than men, associate sex, love, and marriage as belonging together (Weis, Slosnerick, Cate, & Sollie, 1986).â€9 This gender cultural separation has often resulted in physical separation between the sexes into associations, clubs and even at parties where in some societies men are aggregated in the kitchen whilst women are located in the lounge room. http://www.hypoglycemia.asn.au/psychotherapy/sexual_abuse.html