Ah, here’s McSweeney’s with a piece for the xkcd crowd:
0. Newtonian gravity is your high-school girlfriend. As your first encounter with physics, she’s amazing. You will never forget Newtonian gravity, even if you’re not in touch very much anymore.
1. Electrodynamics is your college girlfriend. Pretty complex, you probably won’t date long enough to really understand her.
What I want to know is… which girl is the theory of luminiferous ether?