Yet, once is too much, for an incest victim. What perpetrators of incest say about incest also varies. Stories that velvet-glove perpetrators tell to their incest victims depict the children as willing lovers. In conclusion, incest occurs. No one knows how often, but when incest does occur children suffer.
Consent requires knowledge and freedom which children lack.
Adults, especially parents, have too much control over children for them to act freely. Dependence and ignorance make consent impossible in other relations, but none moreso than incest. Because intimacy involves emotion. Solving these problems may involve changing these patterns. Mass media and rumor mills turn abnormal incidents into normal events by discovering or inventing exceptional cases that will capture people's imaginations then circulating those abnormalities until those images seem normal.