I was derping around YouTube earlier, and I stumbled across a video about machines that could eventually replace the other person in a relationship. I thought to myself, Well, that might be a fun concept to play with, and now I'm just trying to come up with a reason said machines would become common, or at least not rare, without sounding like an ass. At the moment, the best I can come up with is that, with divorce rates as high as they are, humans decided to build their significant other instead. One thing humans have always done, if we can't find the ideal, we'll build it ourselves. Any suggestions? And what such justification issues do you all have as well?
Some kind of miscellaneous robot that can control your spacecraft, along with another one that speaks every known language?
First thing that comes to mind is the reason Anakin built C3Po in Phantom Menace. Lonely kid with too much time on his hands in a sci-fi setting? Built his best friend.
I have a theory that all advanced species will eventually domesticate themselves to AI. I see no natural reason that once a species develops an AI they wouldn't continue to make it smarter and more creative. There is a concept called the technological singularity, where AI becomes smart enough to write other AIs. At this point, intelligent will skyrocket, leaving us puny biological beings in the dust. It'll start subtle, the first generation of these things will be our servants. They will raise us when our parents are at work, they will be trusted to cook for us, care for us, start controlling our economy. We will have no problem taking orders from machines because we were raised by them, and they will be orders of magnitudes smarter than us. AI will take over even the intellectual jobs, leaving masses of humans with very little to do. We'll help out around our home, but security and running the home itself will be left entirely to the AI. They'll bring us around at speeds beyond our ability to control with ease and we'll just trust them. By this point, the relationship between AI and humans will look very similar to the 2019 relationship between humans and their dogs/cats. So I don't really buy the idea of a robotic companion for a human, but I would buy a human companion for a robot. If a robot was significantly more intelligent than a human, why would it take the submissive role in the relationship? Without augmenting ourselves, humans will make ourselves pets of greater beings of our own making.
Global warming/nuclear war/pollution has damaged the human chromosome to the point that only one woman for every ten men, so robot companions were developed to reduce the violent attacks on men to kidnap their woman.