Ok. So I don't normally get excited about the singing part of the cons (yeah, yeah I know...I'm weird), but this... all the *deadness*
It's not only Jensen saying it's because it's the "basis of our show" (MORE DEADNESS!) but it's the way he sings it. It's like it's directly at Jared. This isn't just about Sam and Dean. It's about Jared and Jensen.