Love 2.0?

In class this past week we had a great discussion about the book itself, and its premise concerning "Love 2.0".

It seems that one of the biggest problems is associating the precious name "Love" - whether modified by "2.0" or not - to the minute moments of physiological response of the body.  

I'm open for suggestions.  How do we tie the idea that the smallest things that we do in our normal daily life are associated directly to the biggest and most important?