|"gumballs!" is how I am.|
Aside from the part to do with me, I am faced with the need to quickly build a complex mental model of the asker, who I may have only just met. There's rarely time to do the person or the question justice before they follow up with the inevitable: "something wrong?"
It's hard to explain all this on the fly. I do try sometimes, especially with the cashiers at Trader Joe's, who seem very nice but I don't think quite follow my reasoning.
XKCD to the rescue! Now all I have to do is whip out my phone and point to this page, which explains everything. Surely with this tool at my disposal there will be