Bull. Fucking. Shit. They're gay, and they're child molesters, pure and simple. This seems to be fairly widespread across South Asia, not just among Muslims but Hindus in Bengal as well. But it appears to be cultural more than religious.
Of course, in the West there is a similar culture, and it's called the Catholic Church. And the commonality here is that both cultures despise, fear, and subjugate women (really, all people of both genders, since what they really fear is free expression of thought, but especially women). You can't repress people so forcefully and violently, keep men from meeting or even seeing women, and not expect to get some twisted results. These guys would probably fuck a farm animal or a slab of liver if it came to it.
It's never not a source of constant amazement to see people who commit awful, dreadful shit as a way of life, like it never occurs to them to question their catamite "culture", to stop abusing their children. Not sure what we're trying to "save" here. I find it difficult to believe that the planet would miss these "men", rapists and child molesters is all they are.