Today, Feb. 22, is National Margarita Day. We wish you all an evening filled with salt-rimmed pleasures! What's more, according to Good Vibrations, today is also Lady Porn Day. We wish you all an evening of, well, unsalted-rimmed pleasures. (Ow!) Celebrate accordingly. And, of course, beware: one observance could easily lead to the other. [Laughing Squid, SFGate]