HealthPop video: Bring on the pain, pessimism and narcissism

(CBS) On this week's HealthPop video:

• Men who are really really into themselves face greater health risks - what about women?
• Too much lead exposure causes lead poisoning, which is toxic to organs, including the heart and kidneys. But can lead exposure over a long period of time turn you into a Debbie Downer?
  
• A study has pitted the sexes against each other when it comes to pain thresholds. Who hurts more, men or women?

Find out all the answers from CBSNews.com's Nick Dietz in the latest HealthPop Video.