When it comes to relationships, many people are experiential learners, and they learn more by making mistakes. After they've made a few, they end up altering their behavior and patterns, and then move on to their next relationship—presumably more prepared. If they made a bunch of mistakes with a past partner, yet felt that there was some kind of connection, they may return for a second go 'round. However, the original relationship dynamics can stay the same—even on a second try. Unless both people have changed as individuals, you may be destined to repeat the past. After all, when you pull milk out of the refrigerator and it's spoiled, you don't put it back and hope it's fresh tomorrow. Sometimes, you just have to throw it out.