Ok, so here's the thing.
I've watch a couple of movies, read a couple of books and i keep bumping into one thing when it comes to gods in it.
The are all sly people and are in capable of granting a wish stright out, where in any circumstances anyone would have known what the wisher meant.
Take for an instance, "I wish to be beautiful."
Now you and I both know this person simply wants to be better looking or more pretty. However in the case of a spiteful god, its most probably going to be so pretty they are going to attract stalkers or something like beauty is in the eye of the beholder. Wouldn't you just think?
You'd think they'd give you a break, since you gotta be desprate enough to be able to have the just to ask them for a wish in the first place and i guess there's pretty must the caution of "be careful of what you wish for".