You make a good point about the actual reason why they seem to act in the way they do. But I have a little to say about it.
Although religion plays an important role in the issue, I doubt that it's the principal cause of the problem. What I believe to be the issue here is not the dictations of a certain religion, but the misconceptions people have about it, and the social morals which were later derived from them.
Let me elaborate with a simple example:
In Islam (the predominant religion in my region) women are required to wear a head scarf. A HEAD scarf, not the head to toe blanket that you might find women here, in Pakistan, Afghanistan, or Iran wearing. This is a perfect example of what happens in our society; people are given a certain rule to apply to daily life, which they misunderstand, and thus build upon them the most peculiar superstitions and beliefs, which is what I think happened with the issue I've been discussing.
It is encouraged that opposite sexes try not to be around one another for too long, or for something other than work, etc... This of course was taken out of context and became: "A woman must never coem in any sort of contact with a male unless she is to be wed to that man. The only contact should be extremely brief, and avoided altogether if possible."
Is this just ignorance that has been passed down from generation to the next? Or is there more to it that I don't understand? I hope you can help me figure this out...