Indeed, “Bloodchild” is not about slavery. It is about how the Tlic and Terrans formed an interdependent relationship in which they try to leave peacefully among each other. As the Tlic offer protection, the Terrans offer one male from each family to serve as a host to Tlic eggs.
The Tlic are viewed as evil because they are non-human creatures. They are parasitic that need host animals for their eggs. The Tlic reproduce by laying their fertile eggs in other living organisms where the larvae feed off of the host’s blood. When the larvae hatch, they release a poison into the host’s body where they start eating their egg cases while continuing to consume the host.
A major part of this short story is the influence of culture and society’s expectations. Modern society understands slavery as a treacherous experience, sympathizing to the recurrence of oppression. Butler discusses the approaches by which humans simultaneously protect their survival while also maintaining their survival. The Terrans arrived at a desperate time, so the Tlic used that opportunity to use them as host organisms. There is a symbiotic codependency between the Tlic and the Terrans. The Tlic teach Terrans about the process of reproduction. From birth, Terrans are taught and adjusted to the societal order. In the story, Gan and T’Gatoi develop a relationship that is both loving and manipulative.
Lastly, Butler creates an unusual binary switch in which the men become pregnant. Our modern day society has a fixed view on gender binary. Usually, males have the majority of the power and females are left with little to nothing. Butler criticizes the traditional power dynamic of the gender binary by establishing a world where the power dynamic between men and women are reversed.