Au where you have a stripe of your soulmates haircolor and if they die it, the color changes.

Dean Winchester had this black strip on his wrist ever since he was born. He's ignored it, but now, he payed more attention to it. He's met Castiel, and the strip of black matched Castiel's hair color.. It was strange... Supernatural, as one might say. Dean's payed more attention to Cass, as if he was drawn to him.. Drawn to him.. as if they were meant to be together..

Castiel also felt like he was drawn to Dean. Ever since he met Dean, he felt attracted to Dean aswell. Sam noticed this, and even told Dean a few times, but Dean ignored it. Cass had this sandy blond color on his wrist, which matched Dean's hair color perfectly. Out of the many, many millennia he's spent, this is the only True soulmate he's ever had.

Dean just gazed into Cass's eyes, before looking away. "Dean... Why would Sam havs any intention of trapping me in Holy fire...?" Cass asked, tilting his head with his signature head tilt. "Because, this stripe on our wrists, matches eachother's hair color. We're soulmates Cass." Dean simply stated as he gazed back into Cass's eyes.

"Dean... What is a Soulmate..?" Cass asked, still confused. "Its when two people are born, or in your case, made, with this mark. They match eachother's hair color, and you just know when they're your soulmate. I, I felt more drawn to you, than anyone else i've been with. So I'm making it clear. You're my soulmate." Dean stated, as his gaze moved from around the room, and back to Cass.

"So... I was made.. for you, and you were born, for me?" Cass asked, the holy fire burning out. Cass stepped closer towards Dean, but Dean only stepped back. "Yes Cass... Personal space!" Dean yelled as his back hit the Wall.. "Back when I was watching the Pizza man... I saw him do this.."

Dean didn't know what Cass was going to do, but he felt it all happen in an instant. He was pinned against the wall, Cass's lips against his. He was shocked for a few moments, but kissed back, it full with passion. Dean tangled his hands through Cass's messy black hair, as Cass had placed a hand on the back of Dean's neck, making sure that he hadnt hurt him.

Sam heard the silence, unlocked the door, and ran. He knew Dean would be pissed, maybe not. Meanwhile, the Angel and the Winchester had their little session, but it had to be put to an end at some point.. And that was the stopping point. Dean sent a flirtatious wink to Cass, saying, "We'll continue this later tonight.."

And then shit got kinky