1. Why can't we be friends? This sounds nice but in reality an ex does not make a true friend, especially immediately after the breakup.
2. I must have closure. Closure can be difficult to obtain no matter how many conversations one has. The best closure can come from resisting the urge for dialogue and moving on.
3. I just need to make sense of it all, and I just have one more thing to say before you go. Another version of closure and another reason to stay in contact when in reality this just gives your ex another opportunity to hurt you. Not fun.
4. I want to be available for reconciliation. Wanting to get back together is a fair feeling to have. Even if you do end up reconciling, the relationship will undoubtedly be different. It is still important to take some time without speaking in order to mourn the relationship and contemplate how you really feel.
5. I just need to give his stuff back. Do it quickly, in the first couple days. After that, use one of our many mail services.
6. I miss the physical intimacy. And your ex is familiar because you know him or her (and it won't increase your "number"). But again, this is just prolonging the inevitable and will keep you stuck in the past. Time to cut off the ex and find someone new (or maybe even just yourself) to get jiggy with.
7. We run in the same circles. If this is the case, you won't be able to help running into your ex, but that does not mean you need to get in touch afterward. Keep your conversations polite, brief and away from anything that can bring up negative feelings from the past. Obviously easier said than done.
So while our natural reaction to a breakup may be to keep in touch, whatever the reason, in order to successfully move on, the No Contact rule is a good place to start. No matter how much we want to rationalize, the sooner we stop talking to our ex, the faster we'll move on