The Doctor explains that Paris went through a truncated/forced evolution. But that hardly explains a damn thing. There are traits that are formed by environment, some by predator/prey, and some that are random as all hell. His evolutionary journey is unique to itself. Then we’re to believe after he abducts her and pushed her through “the same” experience, they come about to an M-class planet, finish their metamorphosis, and instinctually mate. Worst. Episode. Ever.