EDIT: edited typo and error in the text
Once i had this coworker that had some Ginger hair in his beard. Was funny cause he was full dark hair and all, and his beard was ginger for no fuckin reason
We wouldn't take it as anything else, but the guy for an obscure reason was in complete denial of this. So as a joke we started to call him Red beard
over the time he started to accept it, and in the end even took the nickname for himself
All to say, sometimes our little things define us, often not, but it can become funny when used right ^^