In the ancient Greek world, an older man, an erastes would take an eromanos, an adolescent boy as a student. The relationship envisaged by his parents involved the man teaching hunting, warfare, and adult male customs to the boy. An integral part of this relationship was anal or intercrural intercourse, with the teacher being the active partner and the student playing the passive role. The rationale of this was two-fold. First, in classical Greek culture, semen was believed to contain important spiritual, masculine qualities that would be passed on to the student during intercourse. Second, male dominance was a part of nature, and must be expressed in every aspect of the male-female relationship. In the erastes - eromanos relationship, the student was inculcated with skills in domination.