 Another researcher stated that about 30% of all perpetrators of sexual abuse are related to their victim, 60% of the perpetrators are family acquaintances, like a neighbor, babysitter or friend and 10% of the perpetrators in child sexual abuse cases are strangers.A child sexual abuse offense where the perpetrator is related to the child, either by blood or marriage, is a form of incest described as "intrafamilial child sexual abuse".The most-often reported form of incest is father–daughter and stepfather–daughter incest, with most of the remaining reports consisting of mother/stepmother–daughter/son incest.