I do note a tendency to consider it "cool," a sort of *eggy bonus* to have double yolkers. It's the equivalent of a henyard BOGO sale, where you get something for nothing.
Nothing is further from the truth. When you consider the purpose of the egg - which is not to delight or feed US, BTW - it is seen to be a detrimental mutation within Nature.
Having said that, it is still neat enough to try hatching one. As Cyn alludes, though, don't expect too much.