Scratch

We are here today to discuss the Uncanny Valley and the strange, often frightening creatures that emerge from its darkest depths at night to roam in our minds, haunting our nightmares. If you are not too sure about what the Uncanny Valley is, let TvTropes sum it up perfectly:

Japanese roboticist Masahiro Mori stated in 1970 that the more human a robot acted or looked, the more endearing it would be to a human being. For example, most lovable Robot Buddies look humanoid, but keep quirky and artistically mechanical affectations. However, at some point, the likeness would seem too strong, and it would just come across as a very strange human being. At this point, the acceptance drops suddenly, changing to a powerful negative reaction.