This is a very primitive reaction, 'hard-wired' into your brain. Same origin as a cat or dog raising the hair on their back - it makes you look more ferocious or at least larger.
A related phenomenon is that the pupils of the eyes will enlarge if the back of the neck is stroked (for many folk anyway).
The hairs on the neck and back that stand up when a dog is showing aggression are called "hackles."
Because ghosts are water bender who cause the blood in you neck to flow faster which make the little yetis on your skin work overtime and push the hairs up.
that is just the way your body grows
Scruff
I think so, yes. Every new piece that he and his team make makes the hair stand up on the back of my neck.
its natural to have hair on your neck even girls have it but if u want to shave it u can it will look a bit odd when it is growing back but its up to you
They can't actually grow back into your skin but it can get trapped like a splinter. It is painful, always remember to wash the back of your neck thoroughly after a cut so that the hair don't get down your back. If you get infected spots treat with an appropiate antiseptic cream.
your dogs mane is the hair in between his/her ears and the back of his neck
Sort of. The base of the neck could be all around, however, and the nape is specifically the back part, underneath the hair.
a mane is long heavy hair on the back of the neck of a horse or lion
The spelling "mullet" is a type of hair style, normally for men, where the hair at the back is much longer than the hair in the front and sides. In some forms, it features a protruding clump of hair at the back of the neck.
Long hair keeps the back of the neck warm in winter. And in the summer, it protects it from the sun.