As everyone has said, he's speaking of a robot designed to fulfill one's sexual needs. If this is the case, I have a theory regarding the usage of the word 'sister'. He could be severely emotionally stunted (which would make going to such measures understandable). He's a distant man, seeing in an android his emotional equal.
He's in a loveless relationship with a woman that he cares about, but the affection he offers isn't reciprocated. She's physically human, but she's so profoundly empty and absent of emotion that interacting with her feels like interacting with a robot. This, however, does make the sister bit confusing. Maybe she feels less like a lover, and more like a relative. There's love there, but in physical matters (sex) there's absolutely none.
They're in a loveless, physical relationship, and he's ok with that. He's cold, but nothing compared to her, and he admires her personality. "My bionic sister teaches me inhumanity" - he wishes to attain this level of indifference from his comrade, his sister in utter nihilism.
I can see three possible interpretations:
As everyone has said, he's speaking of a robot designed to fulfill one's sexual needs. If this is the case, I have a theory regarding the usage of the word 'sister'. He could be severely emotionally stunted (which would make going to such measures understandable). He's a distant man, seeing in an android his emotional equal.
He's in a loveless relationship with a woman that he cares about, but the affection he offers isn't reciprocated. She's physically human, but she's so profoundly empty and absent of emotion that interacting with her feels like interacting with a robot. This, however, does make the sister bit confusing. Maybe she feels less like a lover, and more like a relative. There's love there, but in physical matters (sex) there's absolutely none.
They're in a loveless, physical relationship, and he's ok with that. He's cold, but nothing compared to her, and he admires her personality. "My bionic sister teaches me inhumanity" - he wishes to attain this level of indifference from his comrade, his sister in utter nihilism.