What is it with guys, who are married, that don’t wear rings?

I know of one woman who does not wear her wedding band.

But the world is inundated with men who don’t wear theirs. And it’s not as though these studs are operating heavy machinery where the ring could get caught on some mechanism that would grind their bones to dust.

I’ve been meeting more and more of these ringless wonders. Maybe it’s just a beltway phenomenon. Can someone enlighten me?