"Cas," Dean mumbled, and a black-haired and blue-eyed angel appeared right in front of him.
"Yes, Dean?" Castiel answered, "What's going on? Where's Sam?"
He kicked a rock with his foot and cleared his throat, avoiding Cas' shocking blue eyes.
"Is everything ok?" Cas asked, stepping closer to Dean and analyzing his face.
Dean immediately stepped back and raised his hands in front of him. "Cas, everything is good. I just asked you here for a favor."
"What is it?" Cas asked, and inwardly groaned. Dean always was asking him for help, not that he didn't want to help, it's just that Dean always seemed skittish around him. Which was always worse when Sam wasn't there.
Dean fumbled with something in his pocket, and pulled out his phone. Holding it out to Cas, he asked, with a sheepish smile, "This is just something personal, would you take my picture?"
Cas was taken aback, but nodded and took the phone out of Dean's hand.
Dean scrambled to sit on the hood of the Impala and looked expectantly at Cas.
"You might have to show me how to do this, Dean," Cas said, struggling to find the camera.
Dean chuckled and hopped off the hood. "You have used a phone before though, right?"
"Of course I have, I call you, remember?" Cas replied indignantly, trying to hide his blush. Dean chuckled and hummed in agreement.
After the picture was taken, Dean was getting into the Impala, getting ready to drive off. Before he could leave, Cas put his hand on the driver window.
"Dean, may I ask why you had me take that picture?" Cas asked timidly.
Dean hesitated, "It's for a dating site." He awkwardly coughed and drove off before Cas could say goodbye.
What Dean didn't know is that Cas later found out what a 'dating site' was, and Castiel's heart broke for the millionth time over Dean Winchester.