India is one of two huge countries (China is the other) where people prefer sons for economic reasons. Ultra-sound has made it practical to identify and abort hundreds of thousands, even millions of female fetuses. The result has been many more male (than female) babies born and growing up to adulthood in both countries.
Now we see cases of gang-rape in India, this latest one a Swiss tourist bicycling with her husband. See an Associated Press article on Yahoo News for more detail.
I don't have data ready at hand but I anticipate the participants in such rapes are mostly, or entirely, men without wives. Life is full of unintended consequences. COTTonLINE has wondered what other ugly behaviors will result from this gender imbalance?