A dog lover, whose dog was a female and "in heat', agreed to look after her neighbors male dog at her house while they were away on vacation. She had a large house however and believed that she could keep them apart.
As she was drifting off to sleep she heard awful howling and moaning sounds. She rushed downstairs and found the dogs locked together, in obvious pain and unable to disengage as so frequently happens when they mate.

She was unable to separate them and perplexed as to what to do next. Although it was late, she called the vet, who answered in a very grumpy voice. Having explained the problem to him, the vet said. "Hang up the phone and place it down alongside the dogs. I will 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.