A man driving along runs out of petrol. Just at that moment a bee flies in through the window.
“What seems to be the problem?” the bee asks. “I’m out of petrol,” the man replies. The bee tells the man to wait right there and flies away. Minutes later, the man watches as an entire swarm of bees flies into his petrol tank. After a few minutes the bees fly out. “Try it now,” the first bee says. The man turns the ignition and the car starts right away. “Wow!” he says. “What did you put in my tank?”
The bee replies, “Bee pee.”