In addition to male and female, in these stories a second gender 'dynamics' exists. Specifically a Dom and a Sub.
Dom — they have an instinctive desire to control subs. There are a lot of different Dom satisfaction. They might want to Dominate, Control, Punish, Degrade, Spoil, Protect, Praise, etc.
Sub — they have an instinctive desire to be controlled by Doms. They are the complete opposites of Doms. They want to be Dominated, Controlled, Punished, Degraded, Spoiled, Protected, Praised, etc.