Crowley was the bodyguard of an angel Named aziraphale for over 6000 years now. The two were very close and we're in live but blissfully unaware of it.

After a man brushed shoulders with Aziraphale, yes, ONLY BRUSHED SHOULDERS on accident, Crowley decided to carry him away in bridal style, as if he was "injured".

"Stop wiggling, angel." Crowley said firmly.