Refers to the way men think in regards to their lack of finesse and attention to detail in general;
particularly, though, in socially sensitive ones. Much like using an ax instead of a scalpel to dissect, or a shotgun instead of a sniper riffle to shoot a target.
Anyone exemplifying the man-brain lacks the etiquette to handle delicate or intricate social situations as wells as
critical thinking that requires
consideration for all the problem's aspects.
When a son tells his mother to move her feet so his
girlfriend can sit in an effort to "act more
like a gentleman" as
the mother has been advising him to do. The son is showing a clear case of man-brain.