Kardashian Brother Dating Palin Porn Star

KIM KARDASHIAN’s little brother is dating the porn star who portrays former U.S. Vice-President candidate SARAH PALIN in a series of X-rated DVDs.

Lisa Ann, whose racy new title You’re Nailin’ Palin hit porn stores earlier this month (Nov09), has been dating Rob Kardashian since just before his sister Khloe’s wedding.

And she insists the age difference between them helps sex up their odd romance.

She tells TMZ.com, “Rob treats me like his little teacher and we have a fun sexual relationship that is simple and carefree. He brings out the total cougar in me and I just like to teach him things.”