Why wedding ring on the ring finger is always there, why not in another finger ... I actually also confused but after reading an article, interesting also to note. Try it follow these steps, you'd be amazed because God really makes wonders (this quote comes from Chinese):
1 Firstly, show your palm, middle finger bent inward (see picture).
2 Then, 4 fingers tips to tips.
3. game begins, 5 pairs of fingers but only 1 pair can split.
4 Try to open your thumb, the thumb represent parents, the thumb can be open because all human pain and death. Thus our parents will leave us one day.
5 Close up your thumb, then open your second finger, the finger represent brothers and sisters, they have their own families, so that they too will leave us.
6 Now close the back of your index finger, open the little finger, which represents the children. Sooner or later the kids will leave us.
7 Next, close your little finger, open your ring finger which we put our wedding ring, you will be surprised to find that it will not be opened. Because it represent husband and wife, during your lifetime and your spouse will continue to cling to one another.