I hate a word like 'pets': it sounds so much Like something with no living of its own.
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.
I couldn't care less about who sees my bits... My friends asked how I could do scenes like that and not get excited, but it wasn't like that. My bits looked the size of a cashew nut!

