Well, there are conjoined twins in real life and we can tell a story about them so long as they're not the brunt of the jokes. In this, they're the heroes of this story; we love these guys.
The art of politics consists in knowing precisely when it is necessary to hit an opponent slightly below the belt.
We should note that this latter type of shift was successfully amplified to a considerable extent by Russian physicists using the intense light of a ruby laser whose wavelength is close to that of a transition of the potassium atom.