"I learn quickly," David replies. He always has. He picked up killing more than quickly enough, worked hard to pass every test. They wouldn't have sent him here if he wasn't good, would they?

He straightens up though and nods. "Yes, sir. Of course." None of them had had time to deal with hormones and sex like other children and teenagers might. He understands the basics, but it's hardly the first thing that comes to mind, even if he'd picked up enough to not be left behind entirely if he was around other soldiers.