Strong magnets. But your ear will start hurting (unless you have WWE wrestler's ears) after about 3 hours or more.

The cut of this "diamond" (obviously not real) is not really suited for men's faces. It has a rubic shape and a little protrusion in the middle which kind of gives it a female look.

This would be fine (for men) if the earring is bigger but the size and the cut kind of screams "chick" earrings.

For men, you should go with the round ones if you're considering this.