Crowley and Aziraphale had been...entertaining each other on the couch for quite some time when the doorbell rang. After disentangling himself from the angel, Crowley stumbled to the door, still a bit heady from the angel's kisses.
"Damn kids," he muttered as he yanked the door open, grabbing the large bowl of sweets Aziraphale had brought over.
"Trick-or—" began a small voice. Two horrified eyes stared up at him through a Batman mask. The mask emitted a terrified scream, then turned and sprinted down the block.
"What the—" Crowley shut the door. "He—what was all that about?"
Aziraphale stared up at Crowley, giggling uncontrollably and holding his middle.
"What?!" Crowley demanded of the shaking angel.
"Well, my dear. Have you seen yourself?"
"I—" Crowley walked over to the mirror, then burst out laughing himself. What he saw was undoubtedly demonic: severe black suit rumpled, tie undone, amber eyes burning fire (as they do when he is passionate), and enormous dark wings spanning out behind him. "Well. I guess I do look a bit...frightful." He said to the angel with a leer.