I don't think these men raped this Indonesian woman because they didn't have access to other sexual outlets (which is, I think, what you are implying with your comment above about if they were in the western world...).

Rape is about control and power and violence, not about getting your rocks off. Men rape children and 80 year olds, female and male, ugly and beautiful, skinny and fat, rich and poor, single and married, liberal and conservative...

It's not about being turned on; it's about men feeling inadequate and rage and a whole host of other things.

But please don't talk about it like it's just a bunch of horny guys with nowhere else to stick their equipment. It's a deliberate act of violence against another human being.