I used to see this girl walking her dog (a German Shepherd) in the neighbourhood, and (being pre-zv) I never thought about their 'relationship'. On one particular day the animal was sitting waiting outside a supermarket while she was shopping inside, and there was about six inches of his huge red cock exposed. I was staggered, I don't think I'd ever seen a dog's cock like that before. Again, I never thought about the dog and her fucking, but these days I'm not too sure.
I'll never get to ask her because I don't live in that part of town anymore.