Why Wilson Wasn't Around in "Family Practice" (Excuse the caffiene-fueled randomness)
I read a sick!Wilson fic once where Wilson has a phobia of thunderstorms. It was awesome. I absolutely love phobia!fics and hope to find that one again. Therefore, I like to assume that the reason Wilson wasn't in "Family Practice" was because he was too afraid of the huge, frightening thunderstorm providing dramatic tension for the episode so he just stayed home and hid under the bed.