I tend to be suspicious of girls who never show their feet--they never wear sandals or flip flops, and you never seem to see them barefoot. I always want to think that they have really ticklish feet.
I don't think there is really any logical reason to think this, but I also tend to think that girls who are really sweet and/or have really sweet voices are ticklish. If a girl is bitchy, I tend to think she is not ticklish. Again, I know there probably isn't much logic to back that up, but it's how I think. heh