For our culture - that's probably right.
For cultures which were protected from outside forces - it's not necessarily true.
From:
Rape-Prone Versus Rape-Free Campus Cultures
Published in VIOLENCE AGAINST WOMEN,Vol. 2 No. 2, June, l996, pp. 191- 208.
PEGGY REEVES SANDAY
"Missing from the Minangkabau conception of sexuality is any show of interest in sex for the sake of sex alone. Sex is neither a commodity nor a notch in the male belt in this society. A man's sense of himself is not predicated by his sexual functioning. Although aggression is present, it is not linked to sex nor is it deemed a manly trait. The Minangkabau have yet to discover sex as a commodity or turn it into a fetish.
There is a cultural category for rape, which is defined as "forced sex" and is punishable by law. Rape is conceived as something that happens in the wild which places men who rape beyond the pale of society. In answer to my questions regarding the relative absence of rape among them compared to the United States, Minangkabau informants replied that rape was impossible in their society because custom, law, and religion forbade it and punished it severely. In the years that I worked in West Sumatra, I heard of only two cases of rape in the village where I lived. One case involved a group of males who ganged up on a young, retarded woman. In this case the leader of the group hanged himself the next day out of fear of avenging villagers. The rest of the assailants went to jail. The second case involved a local woman and a Japanese soldier during the Japanese occupation of the second world war and after. To this day people remember the case and talk about the horror of the Japanese occupation.
In the past few years, Indonesia's entrance into the global economy has been accompanied by an amazing shift in the eroticization of popular culture seen on TV. In l995 the signs that this culture was filtering into Minangkabau villages were very evident. To the extent that commodification and eroticization breaks down the cultural supports for its matrilineal social system, the Minangkabau sexual culture will also change. Indeed, today in the provincial capital some argue that the Minangkabau are not rape free.
During my last field trip in l995, I heard of many more reports of rape in the provincial capital. In the early l990's, for example, there was a widely publicized acquaintance gang rape of a young woman by a group of boys. Interviewing court officers in the capital, I was told that this was the only case of its kind. Compared with similar cases in the U.S., such as the St. Johns case, the outcome was still very different. While the St. Johns defendants were either acquitted or got probation after pleading guilty, all the defendants in the Sumatran case were convicted and sent to jail. But, one may well ask whether the criminal justice system will continue to convict defendants as tolerance for sexual coercion begins to permeate popular beliefs."
http://www.sas.upenn.edu/~psanday/rapea.html