As a child your mind is completely open and vulnerable with every experience having a lasting impression on you.
Children are naturally trusting so when traumatic events occur in a child's life such as rape, neglect or abuse, it's incredibly difficult to recover from effects of abuse latter in life due to the memory and experience subconsciously lodged in a persons psyche.
As a child you learn how to act emotionally and psychically in in different types of relationships. When sexually abused by someone close to you, it's incredibly hard to trust anyone growing up with the perception that many people could and want to cause harm to you. It is not only distressing for the victim