Dilbert and Dogbert are sitting by the bank of a river. Dilbert says to Dogbert, "My life has no purpose." Dogbert responds, "Scratch my back." Dilbert says to Dogbert, "Are you saying the purpose of life is service to others?" Dogbert says "Okay." Dilberts says to Dogbert, "It does make me feel useful." Dogbert responds "I think we both found something that works."