The fact that this was an exchange he'd had with everyone from his mother - countless times - to just about everyone who knew him from work didn't make it all that much more tolerable. He'd settled upon a stock answer, but it wasn't very satisfying. "Yeah, that's the family business," he said, infusing it with a carefully practiced mix of cheerfulness and chagrin. "But I fall asleep if you sit me at a desk for more than fifteen minutes, so I thought I'd just take up medicine instead."