I was at my GP for a cold and he always does a look over of me from top to bottom. He told me that my fingers were "bow legged" and I would likely see arthritis in the future. My pointer and middle finger arch out and my ring and pinkie arch out the other way so I have a natural gap (live long and prosper!).
This was 10 years ago. I have severe knuckle and joint pain in my fingers now, but the rheumatologist says I don't!