Out of sight out of mind?

Fine words, and often true.
Yet not a few are people who after decades in living memory have memories of their first love. They forgot all their friends and relatives who have died, maybe parents, siblings, children. But not first love.
His first love is more important than anything else? Or maybe that love itself is immortal. Surely after decades girls appear not only feelings and a particular image. How else would not, for the time man ages, and then the image has changed.

In most cases, however, the eyes can not see are left forgotten. And may in some circumstances we remember something vague, something in the fog, but time and distance has erased the memory.