Usually people suspect or find out that another party has become involved. Code 14/9 provides a neutral and direct way of making this plain. Those who feel that code 14/9 is the best way out of any relationship may use this code dishonestly where there is no other person. Nevertheless there is the background intention to end the relationship and this is seen as the simplest way. Making the other party furious may be the preferred option. On the other hand, where feelings have really evaporated it might be best to use a code that makes this clear. That kills any hope of a renewal of the relationship - even though it may seem more cruel.