Why it is done is to overcome sin which destroys life. Theology turned all of that around. Instead, do what feels good and get advice from church authorities. They teach nothing about morality, while they indirectly teach sin by example. There is no difference.
Sin is the only force in subconscious minds.
Theology which conflicts with Christ's teaching is not a reliable source of information. In fact it is not information. It is nothing more than a control mechanism. It is used to divert people away from the moral truth which Christ taught. Irrationality is the product of sin and corrupted theology.