Four words. Four key words that, no matter what happens in the world, will always give Dean a reason to keep moving. The same four words that he's carried with him since before he could really remember. The same four words that have always kept him grounded.

Take care of Sammy.

Dean would never let anything hurt his baby brother - not the dog that always barks at him on the way home from the store; not the kids that pick on him for being quiet and secluded; not the monsters in the dark that'd love to eat him right up. It doesn't matter who or what it is, Dean will always protect Sam from it.

Sam might not be aware of that four word command that dictates most of Dean's life, but he is highly aware of how protective his brother is. It's part of the reason why he always has and always will look up to him like his own personal super hero. Nothing can take Dean down - not the dogs, the bullies, not even...

...a bear?

"Dean, look! It's just like you!" Dean looks up from the latest issue of Hot Rod to the TV. Sam's watching some Discovery Channel-esque show about bears, educational crap that Dean could really care less about it. At the moment, it's talking about mother bears and how ferocious they get when their cubs are in danger.

"What, are you trying to call me a chick?" Dean smirks a little, grabbing his younger brother and giving him a noogie while Sam laughs and tries to escape.

Once he's finally free, he sits up and grins, "No, jerk. It said that momma bears protect their cubs from everything, even tigers. Just like you do."

"Well, I dunno what tiger's gonna wanna eat you, you're too little." He grabs him again to give him another noogie, but stops after a few seconds to smile down at him, "But you're right about one thing: I'll protect you from everything, Sammy."

Smiling, and no longer struggling against his grasp on him, "Always?" Sam knows the answer, Dean's told him before and he trusts him, but he likes hearing him say it anyway.

Dean nods, "Always. But that doesn't mean I'm your mother bear, squirt." And the wrestling continues.