This week. the social media site Pinterest announced it had gotten very close to developing a "buy" button.

It would allow people to quickly and easily purchase items they see on the site.

Industry insiders have already been quick to proclaim that it could make the site bigger than Facebook or Twitter.

Alice Truong wrote about this for Quartz, and she tells more about how this simple button could up Pinterest's potential.  

While financial experts nod in approval over the Pinterest "buy" button, many personal finance experts worry that it may present a big temptation for average Americans.

Kit Yarrow, a noted consumer psychologist, professor and author of the recent book,  Decoding the New Consumer Mind, explains more about temptation and  how the brain works.