Heh. The following story is true.
My son was a late potty-trainer. We finally got him pee-trained by around August before his 4th birthday. (mid October) He still had an aversion to pooing on the toilet though. We were pretty tired of throwing out underpants but could not figure out how to get him to poop on the toilet. Finally one Saturday afternoon I recalled this video. I thought, what the heck and showed it to him. He wanted to watch it again and again. After watching it about 4 times he went and shat upon the toilet and has ever since. This video is special to me.