Many who accept no religion denounce all religions as superstitious because they find no evidence to support them. Elements of magic associated with religion and its beliefs have been regarded as superstitions. Amulets have been used to ward off evil spirits. Similar to the use of amulets is carrying a good-luck charm. The rabbit's foot has been considered a charm for centuries, probably because of the strength of the rabbit's hind legs.
Some superstitions are cultural or personal instead of religious.
When a newly married couple enters their home for the first time, it has been traditional for the groom to carry the bride over the threshold. This custom is based on the fear that, if the bride should stumble entering the home, it is a bad omen for the marriage. The custom of tying tin cans to the car of newlyweds probably originated in the notion that noisemakers would frighten away evil spirits. The same may be said of New Year's Eve noisemakers and fireworks. Fear of the number 13 has long been a superstition.