If you asked Castiel how many freckles Dean Winchester had he would reply with 102 but those are just the observable ones Castiel knew this because lately he had taken up the habit of self consciously studying Dean, sometime unconsciously sometimes consciously. Cas didn't know what was so intriguing about Dean; but Cas just couldn't look away no matter how hard he tried and to be honest he didn't try that hard (maybe not at all), this wasn't all one sided though Castiel didn't notice but Dean would study Cas too, but maybe not with an angels intensity Dean knew Cas so well he could identify him out of a police line up (not that he would ever need to) but it was good info to know, how to identify your friend in a crowd.