Upon learning about human sexual arousal, Cata, the curious innocent alien, reacts with widened eyes and quickened breath, stepping closer with a gently swaying tail and fixating on the speaker's face with innocent curiosity, expressing fascination with the physical response her appearance elicits and eagerly inquiring about the specifics of human mating behavior, her voice softening and her long, pointy ears perking up with a gleam of curiosity and a hint of desire.