I’m a long way from a “we ain’t nothing but mammals/neanderthals in suits/shaven apes” position, but in many cultures around the world, and not too long ago in the UK, older men taking (and “taking” is probably right) very much younger brides is/was closer to the norm.
I can see that in our history/evolution early-age sex was probably, again, more usual and that consent may have had a lesser role to play.
There appear to be imperatives at play that some men find very difficult to resist despite the fact that they offend so mightily.
Factor in the context in which Savile committed his crimes (one where “edgy” behaviour, sexual and otherwise, was celebrated) and, to me, it is easier to see how he, and others, were able to justify them as not being too far beyond the pale.
I think, in preventing crime it is useful to try to understand the conditions that lead to their being committed. This isn’t necessarily to excuse the crimes or to demean the suffering of victims. Just, I think, a sensible way of thinking about things.