Wikipedia's Erik Möller on the history of child sexual abuse: All Greek to him!
Pederasty in ancient Greece took on mystical significance, where semen from a noble man was believed to give arete to a young man through anal intercourse. This was part of a common practice in Greece where a noble man took on a young male as a student. This relationship was highly idealized in Greek culture and often involved sexual acts as mentioned. Since the practice was so widespread in ancient Greece, and there is no indication of any detractors at the time, many do not consider this an example of child sexual abuse (see moral relativism). Generally, people who hold this view believe that sexual acts can only be termed "abuse" if there is a victim who experiences negative effects as a result of the activities. Since there is no evidence of this occurring, many have concluded that this should not be considered abuse.
— Erik Möller, deputy director of the Wikimedia Foundation, editing a Wikipedia article on child sexual [Wikipedia]