A kiss is the act of pressing ones lips against the lips or other body parts of another. Cultural connotations of kissing vary widely. A kiss may be used to express sentiments of love, passion, affection, respect, greeting, friendship, and good luck, among many others. The word came from Old English cyssan "to kiss", in turn from coss "a kiss". The act of kissing has become a common expression of affection among many cultures worldwide. Yet in certain cultures, kissing was introduced only through European settlement; prior to this, kissing was not a routine occurrence. Examples of this include certain indigenous peoples of Australia, the Tahitians, and many tribes in Africa.