☆Do some further reading and report what you have learned. The following links may be of help.

1. Superstitions A - L

http://www.corsinet.com/trivia/scary.html

2. The Psychology of Superstition

http://www.webmd.com/mental-health/features/psychology-of-superstition

3. Superstition Bash

http://www.csicop.org/superstition/library/common_superstitions/