Short: It’s Complicated
Cas touched a knuckle to a bead of condensation that had begun crawling down the side of the bottle’s brown glass; the surface tension on the droplet burst and Cas lifted away half the droplet to examine, turning his hand this way and that. Dean watched Cas’s careful study for the space of several heartbeats before he asked, in a soft voice so as not to startle the angel, “What do you see?”
“Hmm?” Cas flicked his eyes upward at Dean.
“You were looking at it pretty hard. What did you see that was so special?”
“Oh.” Cas shrugged, grabbing the bottle and lifting it to his lips. “It’s…complicated,” he said after a long sip.
Dean swallowed a sip of his own. “Try me,” he offered.