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One exam down, six to go! Fun times! *dies* Also, I think this will be the last specific colour prompt because I've run out of colours -_-

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105. Grey

Castiel knew that something was wrong with Dean when hysterical laughter wafted out of the bathroom closest to their bedroom. Setting his book down, he trudged to the bathroom curiously to see what was wrong and found Dean staring into the mirror, clutching his hair.

"What's wrong, Dean?" Castiel asked. In response, Dean turned around and pointed to a lock of hair near his ear.

"Look!" Dean was still laughing. "Look, Cas!"

Castiel squinted at Dean's hair but didn't see anything.

"I don't –"

Dean grabbed Castiel by the front of his shirt and pulled him so close that his warm breath ghosted over Castiel's lips. The ex-angel felt a stirring in his pants.

"I'm going grey, Cas!" Dean pointed to his hair and yes, Castiel could now see a silvery stripe in the dark blond strands.

"I don't understand," Castiel said slowly. "Why is that a matter to laugh at?"

"Because I never thought I'd get this far!" Dean was positively gleeful. "I always thought I'd die in my twenties in a blaze of glory! Most hunters never make it this far! I'm practically an old geezer!"

"Your father was in his fifties and Bobby was approximately his age," Castiel pointed out. "What does that make them?"

"Ancient farts," Dean snickered. "But I'm alive, Cas! I'm alive and I'm old!"

Dean scooped Castiel up and whirled around with him, disrupting Castiel's equilibrium. But his happiness was infectious and Castiel just couldn't help but laugh along with him.

"That's it," Dean said when he released Castiel. His green eyes were dark with lust and joy and Castiel felt his stomach twist. "You know what I'm gonna do now, Cas?"

Castiel shook his head, feeling hot under the collar as Dean's hand began to fondle his cheek.

"I'm going to take you to bed and I'm going to have my way with you and you're not gonna be able to walk for a week. You got that?"

Before Castiel could respond, Dean hoisted the ex-angel over his shoulder and staggered out of the bathroom. Castiel chuckled when they ran into Sam and Rose in the hallway and were rewarded with twin shrieks and a, "Keep it in the bedroom, guys!" and by the time Dean dumped him on their bed, his chuckles had expanded into full-blown gravelly laughter.

"Now," Dean said, looming over him with a predatory sparkle in his eye, "where were we?"