Among the various models for how close female friendships were viewed in the 19th century, that of sisterhood plays a regular role. The concept of sisterhood represented a close supportive bond between equals in age and status. Sororal relationships were expected to include a component of physical affection, as well as emotional closeness. In addition to echoing bonds of blood family, the language of sisterhood was common within religious communities and charitable organizations. Thus it was a natural option for intimate friends to use with each other.