You grew up in a pirate port infamous for both the scoundrels who visit it and the feared assassins who run it. You've been around pirates all your life, but you've learned to be wary in your dealings with people, as there's no telling who might be an assassin in disguise.
Looking to make your fortune, you hopped aboard a pirate ship and decided to celebrate your safe arrival with a few drinks at a tavern. There were some suspicious-looking characters there, to be sure, and you decided to give them a wide berth, but as you left, feeling a bit woozy from drink, you were set upon by thugs in a dark alley and knocked unconscious.
Benefit You gain a +1 trait bonus on Sense Motive checks, and Sense Motive is a class skill for you. In addition, your familiarity with the pirate's life allows you to make untrained Knowledge (local) checks regarding pirates or the region.