These people need excitement and even drama in their relationships in order to stay interested. Actually arguments and obstacles are what can motivate them to persist with a relationship. When everything is too routine and peaceful, they would be more likely to stray or at least will subconsciously create some more extreme situation.
They can fall in love very fast and passionately and even go to bed without too much time for assessment. Hence they have to learn to be more patient when jumping into relationship and not look only for the excitement of the moment because their affections are also very changeable and burn out quickly and powerfully! Often their impulsive relationship choices, get them into trouble! This is not the most faithful of positions but if you give them enough freedom, thrills and action, they will stay in love with you!