Big Dog is showing Little Dog around the block. "Sniff, sniff. Smell that?" asks Big Dog.

"Sniff, sniff. Sure do," says Little Dog, "what is it?"

"Fifi's in heat, come on, I'll show you what to do."

So Big Dog shows Little Dog how to hump Fifi.

"Sniff, sniff. Smell that?" asks Big Dog.

"Sniff, sniff. Sure do, what's that?" asks Little Dog.

"Garbage. Come on, I'll show you what to do."

So Big Dog shows Little Dog how to raid the garbage can. Pretty soon, Big Dog goes over to the fire hydrant and takes a leak on it.

"Wait a minute," says Little Dog, "I understand about Fifi and I understand about the garbage, but what is this hiking on the hydrant thing?"

"Hey," says Big Dog, "if you can't screw it, and you can't eat it, piss on it!"