Because American children expect fair exchange for their lost teeth, it is likely that the tooth fairy ritual derives more immediately from the European, and particularly German, tradition of placing a lost tooth in a mouse or a rat hole.

• 因为美国孩子希望用他们脱落的牙齿作公平交易，所以牙齿仙女的习俗可能更直接渊源于欧洲风俗，尤其是德国风俗中把脱落的牙齿放在老鼠洞里的传统做法。