In your blanket statement, you asserted that the parental strange sexual partner in the house just isn’t much of an issue for boys. You also assume that Daddy’s girlfriend is not going to diddle the boys, in the face of all the massive reporting of female teachers involving themselves with children. So I’m just adding balance here.
It is not as much of an issue for boys. Far more girls get abused and are at higher risk of abuse. Its not merely a personal blanket statement, its reality.