when you are at your lowest ebb. when you need love and affection. when the person that you still probably love, deep down, is offering a familiar, warm pair of arms to hold you.
when you secumb to a natural urge in a moment of emotional weakness.
then you have to stay with the cheating, beating bastard for the rest of your life and only have yourself to blame.
excellent way to ruin another life governing dudes
zaphod