The wedding ring finger - finger next to your little finger on the left hand - is supposed to have been believed by ancient Romans and Egyptians to have had a major vein running from it straight to the heart.
I've also heard that they believed that the same finger on your right hand is the king ring finger, the finger that kings would wear their signet ring on, because the same ancient civilisations believed there was a major vein running from that finger straight to the brain.
Unfortunately I can't find anything about the second one on Google, I don't know if that's due to it being incorrect or just that people are far too preoccupied with the first piece of information for me to be able to filter anything out about another kind of ring finger or special vein.
I've also heard that they believed that the same finger on your right hand is the king ring finger, the finger that kings would wear their signet ring on, because the same ancient civilisations believed there was a major vein running from that finger straight to the brain.
Unfortunately I can't find anything about the second one on Google, I don't know if that's due to it being incorrect or just that people are far too preoccupied with the first piece of information for me to be able to filter anything out about another kind of ring finger or special vein.