There’s a slight Night at the Roxbury vibe about this guy, isn’t there? Like a lingering trail of Axe Body Spray follows in his wake, and “What Is Love” is always playing in the background whereever he goes? But that’s part of his appeal, I guess. He’s hot. And you don’t date Chris Hemsworth to discuss string theory or the latest episode of Girls. Here is is arriving at a taping for the Late Show with David Letterman last night to promote The Avengers, looking like a boss.