Normally, it just means they want to wear that ring on their middle finger.
But:
Wearing a black ring on the middle finger to some is a sign that the wearer is asexual. Not everyone knows this, so some could be wearing it and don't know.
Sometimes it's the culture or it's a fashion statement.
No. There is no standard way to wear jewelry just to indicate you are gay. This is a myth. Some people wear rings on their fingers because they like jewelry, not to indicate sexual orientation.
It doesn't mean anything in particular. In most cultures, at least, it is just a matter of preference and/or fashion.
She likes rings?
No, it means they had sex so many times and their house is on fire.
Mostly it does not mean anything. With some it is tradition, but that also depends on the culture.
The duration of Rings on Their Fingers is 1800.0 seconds.
The duration of Rings on Her Fingers is 1.43 hours.
Rings on Their Fingers was created on 1978-10-13.
Rings on Their Fingers ended on 1980-11-27.
Rings on Her Fingers was created on 1942-03-20.
I've Got Rings On My Fingers was created in 1909.
Individuals generally wear their expensive rings or at least good rings on their middle fingers and it does not necessarily mean they are married. However, in some countries (very few) the wedding band is worn on the middle finger.