I was a little off. I could not remember the actual heuristic. marital happiness = rate of lovemaking - rate of arguments Source: http://books.google.com/book

I was a little off. I could not remember the actual heuristic. marital happiness = rate of lovemaking - rate of arguments Source: http://books.google.com/books?id=_0H8gwj4a1MC&pg=PA393&lpg=PA393&dq=marital+happiness+%3D+rate+of+love+making+-+rate+of+arguments&source=bl&ots=YBjgbRQ4WG&sig=wjZA_9JiAYMyj5Ar9YVCorWp9uk&hl=en&ei=w_pZTeD0F4e4sQPEn8yeCg&sa=X&oi=book_result&ct=result&resnum=1&sqi=2&ved=0CBUQ6AEwAA#v=onepage&q&f=false http://books.google.com/books?id=_0H8gwj4a1MC&pg=PA393&#...