ART: The Seattle Erotic Arts Festival is back once again to tease and titillate us with its art and workshops. There's even an auction so you can take something home a provocative keepsake. Continues Sunday. All Day // The Fenix, 1700 1st Ave S // Various prices IRISHNESS: What better way to celebrate St. Patrick's Day than actually learning something about Irish culture? OK, green beer and overindulgence might be better, but you should......