When it comes to our brains, there's no such thing as normal. There's nothing wrong with being a little weird. Because we think of psychological disorders on a continuum, we may worry when our own ways of thinking and behaving don't match up with our idealized notion of health. But some variability can be healthy and even adaptive, say researchers, even though it can also complicate attempts to identify standardized markers of pathology. Source 6o.
Weird is an emotional valuation of a comparison. What we call normal is relative to the average survivability traits in a society, not any specific trait. If a trait, when applied to every member of a society, does not promote the survival of the society as a whole, it is a detrimental one. Detrimental traits are generally weeded out by a healthy society. When they dominate a society, said society will fail.