Luna, Jupiter, and Clyde are giving Alfalfa, Grandma's pig, a bath. But as they turn their backs for a moment, Alfalfa is right back to wallowing in the mud. Grandma chuckles as she heads inside with her bags, explaining that that's just the way pigs are. Which gets Luna wondering, why do pigs love the mud so much? Luna's just gotta know! Educational objective: Discover that pigs love for mud actually keeps them cool, protects their skin from the sun, and even keeps pests away.