Being able to flawless recall a moment would perhaps be useful, but this is NOT how human long term memory works. When healthy, we revisit and reinforce that which is happy, and helpful, and positive. When we can't let go of the past, that's often tied to things we describe as mental illness. Just ask anyone who's ever been treated for PTSD.
I remember that wave of emotion the first time I ever kissed *THAT* girl. And since we didn't have email or text messages, and I hadn't met her parents yet, I can also take you to the precise place on that Iowa highway where I heard her funeral announcement. I drove a couple more miles in stunned silence, before I realized it was scheduled on my 20th birthday.
I'll turn fifty nine in a week or so. Every year she fades a little more, but stopping to write this brings that hurt back, as sharp as ever.
This is a double edged sword and we should think twice before drawing it ...