I occasionally draw a pic or two at school, And quite rarely someone would ask who it is. If it is me, I'd say it was me. They'd quirk their eyebrow and say, "Your a horse?" (well, that is before I became a nice little Wolf/Horse Hybrid)
I'd say yup.
Where it goes from there it depends. One time There was a few intersted people, and they started asking what sort of animal they would be. I must admit it was rather neat. ^_^
I guess it all depends on the person or persons. But It is quite interesting. I usally go off a Ask first, answers later, instead of answers now, more questions later. ^_^ If they ask I say, if they don't ask, I don't bother.