Foreword
The well-known psychologist, Rank, stated that "Sexuality is not natural to child." There is often a physical excess of tenderness during the period, wherein the mother may be unduly responsible for arousing the emotions of susceptible children.
In reading the story of Robin and Poppy Archer, the sexual awakening of the younger sister by the slightly older brother is related to a sexual incident overheard and witnessed by the still innocent girl.
As these two children were apparently well-loved, but perhaps emotionally ignored by the pillar of the family, there was no father image available, the boy takes on the male role, teaching his sister the intricacies of sex, the complexities of this frustrating for both of them, basically satisfying only their curiosity.
Robin and Poppy Archer find the male sex image replaced in their lives, when their mother marries an extremely wealthy man who offers them every advantage and privilege of abundant money. By the time they are in then-teens, and neither of them is concerned with materialistic things, their primary goal being to remain close to each other, sharing in their sexual achievements, alone, together, verbally and physically; and despite their physical encounters with others, always returning to each other. Their freedom sexually draws them to everyone with whom they come in contact. Until they have been intimate with the closest members of their family and friends, the adventures seeming to strengthen their personal relationship even more.
We watch the young girl possess each man she meets, each available woman, her brother taking turns with the same people, the two of them blissfully moving through a sexual euphoria, wanting nothing more than to be left alone, together.
The path of fate is often baffling, and a strange quirk affords them the opportunity they desire. Whether the sexual impulse is simply the expression of a need of evacuation, comparable to that experienced periodically in the bowels and bladder as one believed, or whether "all that is needed is the motor impulse to bring male and female together..." as stated by Havelock Ellis, is true, we cannot determine. Perhaps a basic insecurity thrust these young people together. We can only try to understand their need and fulfillment and follow their adventures with sympathy, possibly empathy.