Justin knows the song. He's not quite prepared for it, having been thinking more along the lines of the motto of the Boy Scouts, but it's the second thing that comes to mind. Tony actually bursting out into the song has an amused smile overtaking his face, and he quickly zooms to the part of his brain that has all those songs memorized to make sure he can keep up wherever it is that Tony stops.

"Yeah! Be prepared? We'll be prepared. Prepared for what? The cold of January in Kentucky! Why, is it winter? Yes, fool, and we're going camping. Making smores, too. Great idea! Who doesn't like smores?"

The mangled song, spoken like Justin remembers it from the movie, is something he thinks Tony will appreciate. Mangled in a good way, as far as he's concerned. It doesn't exactly fit the rhyme of the original, but it's far more relevant than anything else he could think up. That, and it would take him too long to try and parse it properly.

"Because not having had them before, that's, that's a true injustice. And we got vengeance on it, so: job well done, you think?"

There's a soft, pleased laugh as his hand makes a beeline for Tony's hair, pushing a few parts that are sticking up away, only for them to pop back just where they were. It's a losing battle, really, but it's not so much a battle as it something Justin enjoys messing around with. It's an excuse to touch him and Justin will take it for as long as he can, fingers threading through the top of it and pushing it off to the side as though he's just going to try and fix what he can.

Which, when it comes to Tony's hair, isn't a damn thing.