The Dog sitter
A dog lover, whose female dog was "in heat", agreed to house her neighbors' male dog while they were on vacation. She had a large house and believed that she could keep them apart, but as she was drifting off to sleep she heard some loud howling and moaning sounds. She rushed downstairs and found the dogs locked together, in obvious pain and unable to disengage, as often happens when dogs mate.
Unable to separate them and perplexed as to what to do next, even though it was late, she called the vet.
After she explained the problem to the vet he said, "hang up the phone and place it beside the dogs. I'll then call you back and the noise of the ringing will make the male lose his erection and be able to withdraw".
"Do you think that will work?" she asked.
"It just worked for me" he replied.