9. He Has Unexplained Tan Lines Around His Finger

If you notice a subtle tan line or mark around his ring finger but no ring, that could be a major giveaway. Many men remove their wedding rings when they don’t want others to know they’re married, but the mark often stays behind.

Evidence: In Korea, men who want to conceal their marriage may remove their rings during work or social outings, but tan lines or indentations from wearing the ring are hard to hide.