If you’re enjoying a taco or a burrito with a nice lady in some outdoor location, you’re not allowed to lick your fingers between bites. If you do that, two things will happen. One, you will become an eternal pig in her eyes. And two, you will absolutely and irrevocably forfeit any chance of ever having sex with this woman for the rest of your life. Licking your fingers while eating is in the same realm as farting loudly and then pulling your pants down, wiping your ass with a newspaper and then fanning the air in order to dissipate the aroma. Forget it, finito, you’re done.