All the theory of teaching boys to be respectful of girls and girls to behave with kindness are tested daily. There are no easy fixes. It’s just a message we must reinforce daily, sometimes hourly. Our lad must be reminded constantly to respect boundaries. First, those of his sister, and then of all girls. And his sister: she has to be reminded constantly to respond appropriately and proportionally. All we can hope is that eventually, with repetition and reinforcement, they will just get it.