It isn't just the heart that's been thought of as the seat of passion/compassion/charity. Remember Promethius? He had his liver plucked out by birds for his love of humankind.

A couple of posts reminded me of my favorite piece of Kiddie Lit, THE LITTLE PRINCE, by St-Exupery. WW et al, if you haven't read it, you haven't read THE DEFINITIVE love story!