Mulla was riding his donkey home from the market, carrying a massive, heavy sack of beans on his own shoulders. His back was slumping under the weight. A friend saw him and laughed, "Mulla! Why don't you just put the sack on the donkey's back?" Mulla shook his head in pity. "You're so ignorant. This poor donkey is already carrying my weight. It wouldn't be fair to make him carry the groceries too! I'm holding the sack so the donkey doesn't feel the pressure!"