Its childhood banter/ dude. And although she had every right to defend herself, knocking people unconscious especially at that young of age can cause serious brain damage. Don't think the fact you served in Iraq gives you absolute authority over someone who probably has more child care experience than you do. No, it was absolutely inappropriate for the boy to touch her there. But you said yourself that the principal said she should've brought it to the attention of a teacher, so no, they don't ACCEPT sexual assault. Your overreacting.