Ancient Hetaira
As with other archetypes, where you find that their representations reflect a specific culture and the particular psychic structure of the times, the Hetaira, is extremely ancient, but in Jungian thought becomes a sanitised and domesticated companion for a man to suit the household model of patriarchy, whereas Hetaira is more like the ancestral spirit of the lunar, telluric and chorionic Priestess, perhaps Lilith like, where there is no partnering with a man.
Adam complains to his maker, the high Judge of the emerging patriarchal consciousness that she is wild and untameable and non-submissive, she will not partner and remains autonomous. Eve is brought forth as a partner from Adam and for Adam, signifying a shift from communal sexuality to the partnered sexuality of the coming times, a side by side, inter-relation.
Pair-bonding is as simple as evolutionary biology, when humans shifted from more nomadic group structures to the village and settlement requiring the technology of agriculture and extensive labour, producing children as property was needed to sustain the farming way of life.
Progressively Aphrodite also transformed from the telluric Hateira into the Goddess of Love.