Ever wonder why Robert Pattinson and Kristen Stewart are so good at playing hide and seek from the paparazzi? Big duh: They do it on purpose. "I don't know if this is the actual reason why, but we have gotten better at hiding over the last year," Rob tells USA Today. "That's totally the reason," added K.Stew. "They just make up a story to go along with the pictures. If they never get the picture…