Ben noticed the tiny frown and realised his faux pas but not the magnitude of it. He correctly guessed Mick hadn't liked the 'barely remember' comment, but it was just Ben's way of saying things were so different it was uncomparable. If he'd known Mick's thinking went along the grounds of superiority, he would've been frustrated and disappointed with himself. Because Mick then moved on to talking about it, Ben didn't think there was a hiccup of perception.
"You're right, I don't have to worry about getting sick, or dying in normal ways," he said, allowing for a pause so Mick would understand there was still death - as Ben had admitted when they'd first got the conversation going. "But I can't do a lot of things the older ones do, even if trained all night, every night. I'm too young. There's also a lot more rules and politics, if you mis-step, you can be executed. None of this 'fair trial' stuff. Things out of the pages of medieval lore, do medieval things." He chuckled softly, at his own joke. It wasn't anything he expected Mick to laugh at.