We had Sex?

"The best sex I ever had was the last sex I ever had."
The Chemical Buddha noticed that there were certain things in life where the last time he did it was also the best time. Of course, TCB came upon this thinking when he realized that he couldn't remember any of the previous times he had sex. He could remember the people (barely) but not the actual feelings. So it wasn't a lie when he told his partner(s) that was the best sex ever. He found this also applied to other areas of his life. For example, the last time he saw someone was how she or he always looked in his mind. He couldn't remember how they looked before. He might recognize them if he saw an old picture but he couldn't actively call up how they used to look. Just how they looked now. Of course, there was one exception when he could compile all the best possible memories (and add a few enhancements) and that was when he fantasized while masturbating.
How much time do you spend living in the past?
What parts of the past do you unnecessarily hold onto?
What keeps you from enjoying what's happening now?