About a month ago, we learned that Aidan has some "color deficiency", as the ophthalmologist put it. Poor guy -- he was squinching up his eyes and glancing alternately at me and the doctor unbelievingly as he tried to see the image on the card that we assured him was there.
This week, Erin asked me, "Mom, why do numbers have colors?" My eyes got round as I questioned her further; it appears that we have a synesthete in the family.
All this is making me wonder about my own genetic weirdness -- both of these are X-chromosome linked traits.