According to geomantic omen, the left and right hands can't wear rings at the same time.

The so-called saying that left and right hands can't wear rings is mainly aimed at beads and bracelets. The left hand represents a kind of dignity, and it has always been respected. Feng shui and the human body have the same saying. Although the dragon on the left and the white tiger on the right should be symmetrical, the left hand holds less things and the right hand holds more things. Generally, a watch is worn on the left wrist, which is convenient for the right hand to read the watch. The left hand takes less things and the right hand is convenient to operate. Another symbol of the dignity of the left hand, so beads bracelets are left-handed. Some people say that men are left and women are right, which means that physiognomy pays attention to men's left and women's right, men look at their left faces and women look at their right faces, so that the accuracy of seeing things is high. Men look at the palm of their left hand and women look at the palm of their right hand. So most bracelets with beads are worn on one hand.