Theo shrugged at Greg's realisation of just how paranoid and on his toes he tried to be all the time; if he was as relaxed as a long-tailed cat in a rocking chair factory then he wasn't on guard enough.
He twitched a bit, not pulling back out of Greg's grip by sheer force of will for a second before he told himself to stop being stupid and tilted the book over for Greg to see.
"Running's not really my thing. And anyway, I'm not cold-" He was a bit actually. "-but you're hot." That probably shouldn't have come out the way it sounded, but Theo barely seemed to have noticed.