There are three Labrador retrievers itting in the waiting room at the vet's a black lab, a brown lab and a yellow lab. The black lab turns to the brown lab and says, "Why are you here?" The brown lab says, "I'm a pisser. I piss on everything. I pissed on my owners sofa, their carpets, their drapes, but the last straw was when I pissed in the middle of their bed." The black lab says, "What is the vet going to do to you?" And the brown lab says, sadly, "Lethal injection."

Then the brown lab asks the black, "Why are you here?" The black lab says, "I'm a digger. I dig under fences, I dig up the flowers, the bushes. When I'm inside, I dig up the carpets but the last straw was when I dug a big hole in my owner's sofa." The brown lab says, "What's the vet going to do to you?" And the black lab says sadly, "Lethal injection."

Then the black and brown labs turn to the yellow lab and ask, "Why are you here?" The yellow lab says, "I'm a humper. I'll hump anything. I'll hump the cat, the dining room table, a fire hydrant. Whatever I see, I want to hump. Why, last week, my owner had taken a shower and was drying her toes and I couldn't help it, I just hopped on her back and humped her." The black lab says, "So you're here for a lethal injection, too?" "No, I'm getting my nails clipped."