[David Levy] separates the book into two sections, the first related to love with robots and the second concerning sex with robots. In the former, Levy meticulously details an assortment of reasons as to why humans fall in love in the first place. To do this, he cites a myriad of studies and experiments in the field, dating back to the early 20th century.

What Levy reveals is that the process of falling in love is actually a continuation of the attachment process that begins at birth. By studying the work of British developmental psychologist John Bowlby, Levy concludes that the process of attachment continues throughout adulthood in the form of romantic love.

This combined with an attachment to material possessions such as one's television, iPod, or car, Levy claims, will ultimately pave the way for humans to become emotionally attached and attracted to a robot. As outrageous it may seem, Levy's repeated citing of studies related to every possible aspect of the processes of attachment and falling in love, make his thesis all the more plausible with each turn of the page.