"I am thus satisfied that this is a case where the law obliges me to impose a sentence of imprisonment for public protection, not only for the protection of any partner with whom you might cohabit but police officers and members of the public foreseeably likely to be harmed by your reckless behaviour when you lose all self control. I add that this incident arose when, as far as I can see, this was the fourth victim of domestic violence who your behaviour has affected in this way."