Stuck on "Repeat"

Do children think that your response to a question is multiplied by the number of times they ask it? If I ask for juice 20 times I'll get 20 cups! My two year old son will ask me a do something or give him something, and if I don't comply with his request immediately he'll just repeat it over and over. It drives me bonkers! I don't foresee any long car rides in our family's future.