i think you could look at it in a scientific manner, break down the emotions you have into instinctual drives and personal preferences as cultural preferences, but i don't usually stop to think about that when i see a pretty blonde smiling at me.
Of course i never have much luck, so i might not be the one to ask
but yeah i do believe in "romantic" love, i mean there is obviously an emotional side to the physical. Even if you want to be scientific about it, there is still an instinctual drive to protect and provide for a cute girl, thats what keeps humanity rolling along.