I'm watching the comments with curiosity as I feel like there's some kind of 'lookism' going on here...as if there's a human desire that good looking people aren't bad people because they're nice looking, and that a bad person must be horrible and scary looking...a way to make sense of the world. But a very naive way.
I have noticed some attackers and killers have been nice looking men. Libby's killer, PR, he was a nice looking young man and look what he was in to? The boy who murdered the little girl on Bute was a nice looking boy (except for his eyes). But there was something very wrong inside those looks.
I think it's about some human desire to be able to recognise evil and know what to avoid. An expectation that a decent looking young man can get girls without attacking them. But what if inside they have the desire to feel someone's life slipping away in their hands? And remember it's a power thing, control over the life of another human being, the ultimate control to take the life of another human being. It's not about sex as most of us understand sex. That's what I meant when I said I don't believe it was about sex, yet I still expect some kind of sex assault component to it. The Yorkshire Ripper had a sexual component to it.