Knowledge regarding the child sexual development is not only of theoretical interest. It is important to be aware of normal sexual behaviors of children for at least two reasons: first, sexual activities between children should not be regarded as resulting from sexual abuse, and, second, because sexually abused children manifest more sexual behaviors than non-clinical children, so it is relevant to know what the baseline is. However child sexual behaviors can be affected by other factors than sexual abuse: e.g. family attitudes to the sexuality and negative and stressing life events can strongly affect the sexual atypical behavior of children