Socks, Socks, Socks!

What is J.K. Rowling's obsession with socks? Did you know that she mentions situations dealing with "socks" at least TEN times (and counting) in Harry Potter and the Goblet of Fire? Rowling also mentions those woolen or cotton foot garments in the other books as well. Is this some sort of hint or just Rowling's way of having a bit of fun? Personally, I think she just throws in the sock comments to be silly. I mean, who really thinks of socks on a day-to-day basis? Maybe the people at Hanes or Nike might have socks on the brain, but the average person...I think not.