Domestication of the dog?

For those who don't recognize the quote on the new title (above):

Homer (leading into a flashback):
Listen carefully and my words will shape images as clear as any TV show... It was a tumultuous time for our nation: the clear beverage craze gave us all a reason to live. The information superhighway showed the average person what some nerd thinks about Star Trek. And the domestication of the dog continued unabated.

The Simpsons episode 2F10, "And Maggie Makes Three" (aired January 22, 1995)

(Thanks to The Simpsons Archive. Find the full page for that Simpsons quote here.)