Context: It \'s a curved wooden piece , looks like a bow , as in " bow and arrow " , and there \'s a small can at the top although the can is n\'t really supposed to be there . You are supposed to use your mouth in place of the can , but the musician there put a can on there instead so it would be more sanitary for sharing with the kids . Maria played the washboard , and later tried her hand at a fiddle too . Then we went to the park next door .
Question: Why is a can more sanitary than a mouth ?
Option 0: None of the above choices .
Option 1: Because of the tooth decay mouths have .
Option 2: Because of the weight of the can .
Option 3: Because of germs people have .
Answer: 3