Love at First Sight

So as we have been travelling along on our journey through the ocean of stories I have noticed a thread that keeps appearing. The thread I keep encountering throughout these stories is the occurrence of instantaneous love. I don't mean love at first sight, but the realization of love that happens all at once and not slowly over time. When Daphnis and Chloe first saw each other they didn't immediately fall in love, they enjoyed each others companionship, but innocently and as a brother and sister would. Then one day Chloe saw Daphnis bathing "and he seemed beautiful to her" pg.143 and she could only think of how beautiful Daphnis was "and this thought was the beginning of love" pg.143. Later Daphnis falls in love with Chloe when she kisses him all of a sudden he could see her beauty. I guess "falling" in love is the proper terminology if we are basing it on these stories because it appears as if there is no growing period, one minute you are fine and then the next you are aflame with love and desire. Another example of instantaneous love is in the story of Quamar al-Zaman and His Two Sons. When Quamar and then Princess Budur are in turn awoken by the demons they are struck by each other's beauty and fall deeply in love with one another. In the case of Budur, when she "saw Quamar al-Zaman, she fell passionately in love with him" pg.218, though she chided herself for it because he was a stranger, she still was in love. When I read stories like these I wonder how the idea of sudden love came about. Did someone actually experience it or is it just a speeding up of the process people have to go through in order to find love?