First of all you give the dog a stick to bite on then you gaffer tape the dog up , not forgetting to leave holes at the nose for it to breath , then you pour bleach over the wound , and by the time youve done this the dog dont seem to be bothered about being stitched....
Failing that using the proper equiptment helps , plenty of people get stitched without anaesthetic without punching the doctor.. a good sharp needle and you dont feel a thing