I have now ruined "The Notebook" for three females. (gf, plus two at work)
However, they argue that sometimes cheating is justifiable. I cannot think of an instance where it would be. Perhaps if a robber put a gun to my head and forced me to have *** with his lady, or some other far out extreme scenario.
I guess I am alone in thinking the commitment means I am picking one person out of all others, dismissing the potential that others may be better suitors, and ensuring that I have no emotional attachments to no one other than the one I have selected.