People who were abused in their families of origin may practice the same abusive behavior towards themselves. They may also pass it on to their children. This creates a sick, and sometimes fatal, cycle of abuse that repeats itself generation after generation.
A lot of people assume that rape, molestation and incest are about sex and seduction, but they aren't.
...one woman is courageously documenting her process of healing, including her battles with the psychiatric community and their insistence on diagnosing and medicating her. You can read her blog at Invincible Summers. I highly recommend it.