Just imagining Legolas asking himsenlf 'what would Jack Sparrow do?'
And as he's throwing a dead pirate over the rail, Jack raises one eyebrow. 'And this is what you have arrived at?'
I wonder if a googled site told him to assault her in an isolated spot, in which case he is responsible in that 'this is the site you arrived at.'
Or if he just completely misread a more socially helpful site. Then he is responsible in 'this is the interpretation you arrived at.'
Either way, he needs a social worker.
It's possible he reached a site aimed more at "flirting" which I can imagine would instruct someone to gently touch an elbow or something like that.
But whatever he googled or whatever interpretation he came up with, I simply cannot see either of these actions as 'sexual' assaults. It seems to turn solely on the idea that the girl believed he intended to touch her breast the first time, when that isn't what he did.
It also seems like the judge has an empathy gap for anxious introverts and says explicitly he cannot imagine any motive other than sexual.