Taking a snooze in mud may not sound very appealing to you. To a pig, however, a mud bath means coolness, comfort, and protection from bothersome insects. ＿＿（41）＿＿ , a pig can't buy insect repellent or sunscreen the way you can. A thick coating of mud protects the pig's sensitive skin from ＿＿（42）＿＿ and from the sun's burning rays. The mud also helps keep the animal cool. ＿＿（43）＿＿ very few sweat glands, pigs cannot cool off by sweating. On hot days, they may pant as dogs do. But stretching out in cool mud is an even better way of ＿＿（44）＿＿ the heat of a summer afternoon. Some people think that pigs are dirty animals because of their habit of bathing in mud. ＿＿（45）＿＿ , pigs are very clean animals. Their relative, wild hogs, seek out clean, fresh water for cooling off. And when barnyard pigs are given a choice, they prefer bathing in cool water to lying in the mud. Many farmers help their pigs beat the heat by giving them frequent showers.