The subsection system underlies all of traditional Warlpiri society, determining how Warlpiris address and regard each other. Two members of the same subsection refer to each other as siblings, whether or not they actually have the same parent. Men in the same subsection as one's father (for example, one's father's male siblings) are called "father", and this practice is often followed even when Warlpiris speak English. In the same way, most of the kinship terms in the Warlpiri language actually refer to subsection (or "classificatory") relationships, not to literal genetic relationships.