Basic Trope: Two characters whose sexual/romantic attraction is obvious to everyone except them. * Straight: Alice and Bob very clearly seem to have romantic feelings for each other, but for whatever reason, neither will act on it. * Exaggerated: Alice and Bob make out with each other at regular intervals and routinely go on what could be considered dates, but neither seems to think anything of it. * Justified: One or both is Oblivious to Love; that, or they've been friends for so long that this is just normal behavior for them. * Inverted: Alice and Bob are dating, and no one can figure out why. * Subverted: They really are just friends...Bob is like that around all women. * Double Subverted: ...but he really cranks it Up to Eleven around Alice... * Parodied: Car