This is something I've pondered today. Could the thing we call love, that all-pervasive love, the stuff that makes us "human" ... could it be just ... a meme?
AFAIK, romantic love is a relatively new notion in human society (relatively new being not more than too many centuries old).
I invite all the intellectuals and philosophers of Everything to comment on this. share your views on this. and maybe we'll all learn something from the process.