Men have worn earrings in the past. Just look at old pictures. The ears of kings and dandies through the ages display all sorts of bobs and pendants. A well-known portrait of William Shakespeare shows the bard wearing a small gold earring. It looked much like the one on the fellow wearing the tractor cap.
Male fashions change.
The earring shows that men are willing to revive fashions of the past. The gold male neck chain can be seen sparkling above many a hairy chest. And it seems to have reached its zenith. A few of us traditional fogies have held out, declining to snap a chain around our necks. But neck chains no longer draw comments unless oversized gold medallions happen to be suspended from them.