A whimper unwittingly escaped the angel as Crowley's tongue withdrew, leaving him just the littlest bit breathless.

In for a penny... he thought, eyes sweeping over Crowley's awaiting expression.

Aziraphale ran his fingers down to Crowley's sides and gripped them nervously as he leaned forward and kissed him back, his own tongue - less adept, less experienced - slipping between the demon's lips.