forrest was in a position of trust. that position has conferred upon it trust by society that they will take the higher moral stance and remain an example to the those that they teach. there is no crime of passion, his punishment is harsh because not only has he broken that position of trust - but he implicitly used it to his own gain. girls that age are flattered by elder male attention - in a similar way that women can fall for their male psychiatrists. the rule is clear, it is a position of trust over vulnerable people & when it is broken it must be punished harshly