what is this thing called love,?

LOVE, so they say, will never be out of fashion. Red roses, tender songs, pink missives, romantic day drams, pedestalled Aphrodites and Adonises, young and old thoughts of companionship, love-aches or heartaches -- all these manifest that nobody is incapable of loving as of being loved.

Hollywood movies with love in their titles abounds: "Love Story," "Love in the Afternoon," "Love Letters," "When a Man Loves a Woman," "Women in Love," and "Love is a Many Splendored Thing." So, what is thing called love?