I saw a romantic (actually is old wives tale) reasoning for why wedding rings are worn on the 4th finger. This is some old Chinese story made up by some bo liao aunty years and years ago I guess.
– The thumb represents your Parents.
– The second (index) finger represents your Siblings.
– The middle finger represents you.
– The fourth (ring) finger represents your Life Partner.
– The last (little) finger represents your children.
Open your palms (face to face), bend the middle fingers and hold them together, knuckle to knuckle. This is you, and you know that you’ll always have your own back.
Then open and hold the remaining three fingers and the thumb – tip to tip.
Now, try to separate your thumbs (representing the parents). They will open, because your parents are not destined to live with you lifelong, and have to leave you sooner or later.
Join your thumbs as before and separate your index fingers (representing siblings). They will also open, because your brothers and sisters will have their own families and will have to lead their separate lives.
Now rejoin the index fingers and separate your little fingers (representing your children). They will open too, because the children also will get married and settle down on their own some day.
Finally, rejoin your little fingers, and try to separate your ring fingers (representing your spouse). You’ll be surprised to see that you just CANNOT, because husband & wife have to remain together all their lives – through thick and thin.
I tried this out for myself and lo and behold, I really couldn’t separate my ring fingers. The only way was to unjoin my pinkies and forcibly move my palms apart. Try it for yourself!