All this hyperbole about 'dark arts' and his eyes mysteriously changing colour is a bit daft
I completely agree, he's just like any other attractive looking bloke (depends on your taste, obviously) with money and a bit of an attractive edge. Women flock to him, crave his attention and he took advantage and went several steps too far because there wasn't much to stop him. Nothing mysterious or dark arts about that.
If you know what you're looking for, you will see in a potential sexual partner that pupils dilate during sexual attraction. The little black centre of the eyes (pupils) get much bigger. Sexual arousal dilates them even more. The more sexually aroused one is, the more your pupils will dilate. So a blue/green/brown eyed man will turn into a black eyed man. A little bit of colour round the edge, but mostly black.
That goes for women too. So that would explain the eyes going dark stuff.
I'm not defending RB. Just saying that the eyes going big and black during a sexual encounter is pretty normal and not evidence of it being non consensual. Nor is it enough evidence to put someone in prison.
I can always tell when my husband of 30 years fancies a bit of the other.
His pupils dilate when he looks at me. I find that squirting him in the eyes with a sodastream will focus them up again.