Just to clarify a social norm "Right is wrong" is what DH learned when he got his ear pierced 25 years ago. So only right earred earring wearing men should be turned down for employment at Chick-fil-a. :D But I doubt that is happening.
DH is a conservative midwestern farm boy and he was just about the last person anyone would think to get a piercing back decades ago. But in his family, it's traditional. This is what his grandfather wore. I do not know if there is a preferred ear for the Swiss earring which is a symbol of dairymen. The round thing is a scoop for the milk can.
http://tinyurl.com/d2ocuq6