Long Destiel One Shot

Training

The countless hours that are spent in the Impala could possibly be heartwarming. Even Cas has left his mark on this Car. We all know how the army man is stuck in the door, and lego in the vent that still rattles to this day. It seems that the car holds possibly everyone's personality, so what did Cas leave behind in the famous Impala 67(the car that saves the world)?
No one ever seems to talk about what happens on the rides to a case. These are the little things. The things that make each case worth it for Dean, the things that Cas always seems to notice and comment on. Like the bruises on Dean's thighs, not from a fight, but because Sam tends to kick in his sleep. The smell of beer that never seems to go away. And we all think that Dean is always the driver, but he does need his 4 hours of sleep.
Cas has been begging to participate in a case, with his wings gone he feels useless. Dean knows the feeling, he felt this when his dad would go on cases without him, so he spent a month training Cas in the bunker.
Dean felt familiar when training Cas. The way that he would wake up at the crack of dawn, spend hours straight teaching him to fight, this was how his dad taught him. This was how he taught Sammy. Sometimes he would wonder if it was ever really healthy the way his dad did it. He would quickly push this thought out of his mind, though, he turned out fine...Right?