Free online sexbots
As I point out to my students, Kant seems to have anticipated the psychological devolution of serial killers.
For example, a human who has long and faithfully served another person should not simply be abandoned or put to death when he has grown old.
As such, it seems well worth considering the ethical issues involving sexbots real and fictional.
At this time, sexbots are clearly mere objects—while often made to look like humans, they do not have the qualities that would make them even person-like.
Likewise, a dog who has served faithfully and well should not be cast aside in his old age.
While this would seem to create an obligation to the dog, Kant uses a little philosophical sleight of hand here.