"Yeah, tough shit for your son there, but hey it's all for the greater good."
Behind that statement is the assumption that it is deeply unfair to expect men and boys to take responsibility for what they do sexually.
In no other area of life do we so consistently argue that people shouldn't have to held responsible for their own behaviour - except perhaps motoring offences, where people whinge that it wasn't their fault they caused that accident, the car driver in front of them was being annoying and forced them to overtake at a place where the highway code states clearly they're not allowed to.
My son has been taught that he is responsible for his actions. When he learns to drive, he will understand that when he's behind the wheel, he and only he, is responsible for how he drives - when he puts his foot on that accelerator or brake, he's responsible for that decision. When he has a row with his sister, however irritating she is, if he hits her it's his decision and his responsibility - he's been taught that he can't control her behaviour, but he can control his response to it. When he is in nightclubs, if he chooses to pick up a girl and put his penis in her without being absolutely certain that a) she wants him to and b) it's legal to, then he knows he's responsible for that.
I'm pretty sure that "knowing" Nooka as a poster, her DS also knows this.
Those of you who aren't bringing your sons up to take personal responsibility for their own behaviour, do the rest of us a favour will you - keep them away from our daughters.