The PetPeek is a plastic window you install in your fence to allow your dog to bark at more things, more frequently. Is this good? Some people say yes; their neighbors say no. It might be entertaining to think of a dog looking out a dog window, or to imagine that your dog will gain some pleasure or insight from seeing cars drive by. It's also entertaining to think that your silverware has a better time in the kitchen if you leave the drawer open. Neither, of course, are true.
Most disturbing of all is the manufacturer's picture, which shows the PetPeek at crotch height, subtly suggesting you "accidentally" install it there, and then, cursed by fate, stride by it slowly, or stand with your reproductive system hanging out your fence bubble. It was purely coincidental, officer. It's within my right to be nude in my yard.