OK, love might be a chemical reaction to scientists but their conclusion is based on two things among other many-splendored things that love is.
Learning and Curiosity.
Loving to learn drives the human spirit. How else could we explain all of the mankind achievements? This reminds me of the wonderful things I've learned during Perimeter Institute's Einsteinfest events. Curiosity was one of Einstein's strongest character trait.
Loving to learn reminds me also of the daughter Francie visit to the library scene in the wonderful movie "A Tree Grows in Brooklyn" shown recently by the TCM network in its 31 Days of Oscar series.
Love and Peace,