As porn becomes more amateur (via Xtube and its ilk), it becomes more amateurish. One of the most hilariously awkward symptoms of this is the appearance of pets in videos featuring their owners getting physical/animal. Notice I used the word "appearance," and not "participation." The distinction is, you know, vital. Anyway! Someone close to me has started a Tumblr of edited screen shots to document this sort of furry awkwardness. It's called Heavy Petting, and I think the brilliance of the idea is only reinforced by its execution. (Full disclosure: I kinda wanted it to be called Accidental Bestiality, but I guess the b-word is a total no-no.) Anyway, go there (it's somewhere between SFW and NSFW), and love it.
Bonus: Check below for an animated gif that I contributed to the site. Again, notice I didn't say "participated in."
Overzealous dog looks at one dude, then the other and then gets the fuck outta there. Best animated gif of all time, y/y? Debate that topic at Heavy Petting.