Women Who Wear Fake Rings

I'm not sure if this is the right place to post this, but I see no other place to do it.

Why do women wear wedding rings if they aren't married? It beats me as to why anyone would wear a fake wedding ring; my guess is that they don't want to be bothered. I once spoke to a woman and noticed that she had a ring on her ring finger so I didn't bother to ask if she was available. Strangely enough that ring disappeared the next day. I didn't show any interest in her at all that day, or the day after.... matter of fact I just didn't like at her at all anymore. End of story. Is it strange to dislike women who do this?