I remember my brother coming home one day, at 14 or 15, with an earring in one ear. My dad ignored my brother, turned to me and said "you know Eric there are two types of men who wear earrings, pirates and homosexuals, and you don't see too many pirates around any more." My brother turned on his heals and walked out of the room. We never did see that earring again.
In all seriousness though, earrings aren't my thing, but since there is nothing unbiblical about them their use should be a matter of personal taste and liberty.