Mom came home with a white Toy Poodle somewhere in the late 50s. Her name was Coquette and she was both smart and spoiled. She usually slept with me and her favorite position was draped over the top of my head like a horseshoe, of sorts. This didn't bother me until one morning I woke up laying on my side staring at her... ...well, you know!
Mom trained Coquette to do her "business" on a newspaper on the back porch. This was quite efficient and the dog always used her paper. Anyway, one day we were returning from a trip to the mountains around L.A. Coquette loved to ride in the back window of the car which is where she had perched herself on our trip back. Suddenly, the car swerved and Dad started cracking up. He had just checked his rear view mirror and saw poor Coquette trying to hit a small 3 x 5 piece of paper that happened to be laying there. To our amazement she hit her mark and parked her "poo" dead center. Of course we had to roll down our windows, pull over, and deposit the droppings on the side of the road (but not before we got to watch several cars pass us filled with people laughing their heads off).
I really liked the idea of paper training so, many years later when I got a dog for the kids I paper trained him (key word). His name was Jasper (an adorable Beagle) and he took to paper training at an early age. I was real pleased with myself as I never had to get up to put him outside. He just did his business on newspapers on the service porch. However, months later I was in the kitchen and I looked up to see him hike his leg and pee on the wall. To be honest about it he did pee on the paper, as it did run down the wall and onto the paper. I couldn't believe that I was so stupid. It took me a while to convenience him to abandon his back porch training and due his "business" outside.