The following article is very comprehensive and does a good job of defining sexual abuse, how to identify a perpetrator, risks and symptoms. I often find that adult clients of mine have a difficult time knowing whether or not what they experienced in their childhood/adolescence was abuse, whether or not they were somehow at fault, and whether or not the perpetrator was in fact a perpetrator. Symptoms they experience are seen as personal weaknesses and shame/self-deprecation take hold in very detrimental ways. Hopefully this information can be useful.