In Mary Shelley's Frankenstein, the creature wants Victor to create for him a mate so he won't be so alone.
When the creature first makes his request, Victor flatly refuses. He believes the presence of a mate would allow the creature to be more dangerous than he already is by their sheer number. He could not release a second monster on society. He refuses to comply.
At first the monster gets angry and threatens Victor. However, he settles down and tries to logically reason with his creator. He entreats Victor to create another like him so that he is not alone. He uses sound reason, explaining that he is only violent because of how he has been treated. The creature promises that they will go far away and no one will ever see them again. Victor feels sorry for the creature and finally agrees to the monster's request. As the creature leaves, he warns Frankenstein that he will be watching him all the time to make sure he keeps his word.
"I swear," he cried, "by the sun, and by the blue sky of...
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