earlier in the week, i had a dream that i was sneezing uncontrollably. it woke me up and i started sneezing. i couldn't get myself to stop for almost 20 minutes. did i dream about sneezing because as i slept i felt that i had to sneeze, or did i psych myself into sneezing by having the dream?
unlike the chicken-and-egg problem, i don't think this one is solvable.