Two dogs were sitting in a vet's office. The bigger of the dogs gruffs, "Whatcha doing here?"
The little dog responds, "I'm getting 'fixed'. Whenever I see my mistress I get so horny I just jump on her leg and start pumping. It's very embarrassing."
The first dog says, "Yeah, I know what you mean. One morning my mistress had just got out of the shower, and was sitting on the side of the bed. She leaned down to pick up her clothes from the floor, and I couldn't resist it... I jumped up and starting taking her from the rear!"
The second dog exclaimed, "Wow! So you're here to be fixed too?"
