We say no.
There's a belief that cutting the hair of a very sick or dying family member could hasten death.
Superstition is a belief or an action that is inconsistent with science, says Stuart Vyse, a Connecticut College psychologist.
Vyse says only 40 percent of Americans believe in evolution and over half of Americans have some kind of superstition that they believe in.
"Count yourself lucky if you're NOT superstitious", he said. "In a world where we prize science, it may not be something to be proud of."
See a list of some of the hair customs and superstitions at HubPages.
Here are the 10 reasons why you should stop being superstitious shared by Beauty And Tips.