A doctor had just had a fantastic time with his partner in bed. As he laid exhausted and ruminating, he heard a voice inside him ask "Aren't you ashamed of yourself to have slept with one of your patients?"
To this, pat came the reply from another voice inside him. "I'm not the first doctor to have slept with one of my patients."
The first voice persisted, saying " I agree, but do you remember one thing?"
"What?" asked the second voice.
"Howard, you are a veterinarian!", replied the first voice.