If telepathy worked over phones, Jack wouldn't need to ask the question.

"I was talking to Derek," he said, and hesitated. "About love and sex and how they're hard to tell apart, and ... do you think it was wrong for Sebastien to be with me?"

It was one of those questions you ask when you've thought something through, and don't like the answer you've come to, and want someone else to tell you you're wrong.