The Uncanny Valley Phenomenon

When we first evolved, there were nine near hometed species such as nanatals. We know the exact number of subspecies that our ancestors lived with. If someone or something looks almost human but not quite, it could be sign that they have a genetic condition that's bad. This is one reason zambes that look like kind of, they're deteriorating. That's one reason they're creepy. It's not safe for us to be around dead human bodies that are deteriorating. Those signs of death and decomposition need to repel us so we stay away from source of infection.