How many times can you watch a toddler fall off a bicycle, a dog run into a wall, or a father get hit in the nuts?
At least six hundred times, which is the current episode count of America's Funniest Home Videos. Watching AFHV is kind of like watching COPS—it isn't a willful choice, just random rubbernecking as you flip through channels, looking for something to numb the pain of the world.
There must still be demand for the show, or it wouldn't be on, but it's hard to imagine the person who tunes in on a regular basis.
Note: That person has been found, and will be on the upcoming season of Dexter.