I'm not experienced with addictions, but I can kind of see it. For example, if a person is on a diet, and goes out and eats a huge Mexican meal, she can decide that she might as well have dessert, wine, and a midnight snack, since she's already "blown it"!
Yes, something like that. Or an alcoholic who wakes up with one of those remorseful hangovers - goes out and drinks some more to drown out the remorse.