Popa, I can certainly understand and accept your point of view. I simply and respectfully disagree with it. In the circumstances described, in the end, a person needed REAL and immediate help, and gender should not enter into it. If it does, then in my humble opinion, that is something that is difficult for me with the hashkafa you describe. It is not normal to see someone fall and not try to help them. We would do as much for a man’s donkey. Are we less choshuv than an animal?
Whether the girl was pretty or plain, she fell, she needed help, and as far as I am concerned there is not even a question of what the right thing to do would have been. I would do the same if a man fell in the street, and I wouldn’t hesitate a moment at the very least, to ask if he WANTED my help. If not, then I would look for a man to help him. Those boys did nothing at all, from what was described. That’s not the Torah I was taught. Al taamod al dam reyeicha. Maybe just the dam coming to the person’s face from embarrassment, is enough of a reason. But I do acknowledge your differing view.