I'm in the middle of some medical research and found an interesting article about why people tend to sneeze when they look at the sun. It turns out that only about 25% of people actually sneeze when they look at the sun and it is apparently triggered by a "crossing of pathways" in the brain. The normal reflex of the eye gets messed up with the sneezing reflex and we sneeze. The worst part about it is that there is absolutely no benefit to sneezing at all. (According to the article...)
Do you sneeze when you look at the sun?