I think that is a complex and worthy thing to debate as it addresses many different points; agency, regret, information, intent, consent.

I think the law deals with similar concerns by not basing a judgement on how someone feels, but rather on actions and agreements. Did they lie, cheat, steal, deceive, coerce, manipulate, intimidate, threaten, abuse, etc in context of some agreement or lack thereof. But that's just the law; obviously there is an entire world of morality/ethics that exists outside the law with different considerations.

I'm just saying, he hit on a minor, and he doesn't appear to be a moron, so screw this guy.