User blog comment:HannaValdez/Leo not afraid of heights???/@comment-4584676-20111205203405

I think it is more of a general characteristic like all demigods have ADHD. Frank didn't have ADHD and he's still a demigod same with Jason (I think. I don't remember which of that trio didn't have ADHD). I'm sure there are also children of Athena who aren't extremely scared of spiders. It is probably more or less a general characteristic of his children that RR wanted to put in.