I wonder

I wonder about Gilgamesh and Enkidu, Achilles and Patroclus, Alexander and Hephaestion - haughty half-godly heroes and their noble companions. Why such quick deaths for the companions, vanishing like raindrops beneath the scorching suns? Even more I wonder at the heroes, at last human in their grief, broken by their love. What kind of mystery, what strange law, would make a raindrop extinguish a sun?