As to how sexual predators pick their victims:
It isn't about morality as much as availability and yes, vulnerability. Sometimes it is the MORE moral person, because that person just can't fathom that a "man of God" would actually have evil motives.
I noticed how, in many of the sexual assault stories, they begin with VP or another predator doing something "edgy" -- casual nudity, spanking a woman on the behind, Sandusky's horseplay in the shower. The predator does that on purpose, to push the boundaries and gauge the reaction of the potential victim. A sharp rebuke will result in denial of motive -- "we were just horsing around, it didn't mean anything" -- and the predator might even accuse the victim or the witness of thinking evil. But if there are easier prey available, the predator will most likely write off the one that was hard to catch, though some feel entitled to continue to go after even the resistant ones in ways that will humiliate them.
Sandusky:
sets himself up in the role of a hero
creates situations for physical contact
uses "edgy" behavior to lead to assault
pleads guilty to the lesser charge of edgy behavior, but questions the validity of witnesses
Sound familiar?
-- Shaz