What’s really in those Hot Dogs?

There are few things more enjoyable on the Fourth of July than spending the afternoon outdoors waiting for another sizzling hot wiener to come off the grill, am I right? 

And the best part about hot dogs -- other than the fact that they're delicious -- is that we're able to enjoy them despite not really knowing exactly what's in them.

So to clear things up, but hopefully not burst your hot dog-loving bubble, here's what you're actually putting in your tummy: