Shame exists wherever there is a “mystery”; but this is a religious concept, which in the older times of human culture had a wide extent. ... Sexual relations, for example, which as a privilege and adyton [this was traditionally the most sacred place within a Greek temple, reserved for the priests and priestesses] for adults…
Nietzsche quotes: Parents and Children
Which child would not have reason to weep over its parents? - Thus Spake Zarathustra, part I, Of child and marriage.