There is something really mysterious about David's ring fingers. When I trim his finger nails the ones on his ring fingers always grow much faster than the others (almost two times longer). I vaguely recall that it was the same with Alyssa and Vivian when they were a baby, but the difference wasn't so dramatic. Don't know if it's just David (or our family).
[update] I dig around on the web and apparently there are some research about fingernail growth rate out there. The general rule is that the rate is correlated with the length of the finger. I'll have to check their finger length to find out about this