From a very early age Shinra and a group of other children were considered “special”. “Destined” to die by the hand of their god. They weren’t allowed to cut their hair, wear anything but silk and gold, eat “impure” food, or touch anyone directly, including their own parents.

logically Shinra knew his decision was dumb, to cut his hair and spend the night with a village girl. It was “an act against god.” But he didn’t think they would be tossed into a cave, left as a sacrifice to a demon