Pastor William Carter said that on his Christmas vacation during his first year in college, he had become an expert on the birds and the bees. Biology was his major, and after a semester in the freshman class, he was certain that he knew more biology than most adults did in his hometown ... including his minister. A few days before Christmas, he stopped in to see his minister, who received him warmly and asked how he had fared in his first semester. “Okay,” he replied, avoiding the subject of his mediocre grades. But then he told his pastor, "I’ve come home with some questions.”…