Sun Sneeze

I'm not sure we should trust someone who admits to being skeptical of the very idea of sun sneezing to explain why the sun makes others of us sneeze. I can't dispute his explanation for why it happens, but I have to dispute his conclusion that it serves no purpose. We've all had those times when we felt like we really wanted to sneeze (from a cold, for example) but it just wouldn't happen. I can sometimes solve this problem by staring into a bright light, thereby using the photic reflex to finish the job that the regular sneeze reflex wasn't up to.