"Forever is a long, long time and time has a way of changing things." – Fox and the Hound (Disney)
We throw around strong words like love and hate so easily, but do we really mean it. These words are like a promise of your never-changing emotions. Human emotions. Human nature and human nature has a long history of change, of humans being indecisive of their emotions. Who says love is never changing? It's changing all the time. Why do people get divorced?
Such words are thrown around too much that they loose meaning. I love you forever and for all eternity. Phrases which are mean to be romantic hardly mean anything now...
So when would we ever use them?
Never. (Get the irony?)