Today on the Signorile Show

President Obama is having an LGBT Pride cocktail party in the White House, but his position on marriage equality is hanging thick in the air. Today, once again, he was asked several times during a press conference and got tongue-tied. And now Michele Obama is denying claims that she is in favor of marriage. Can the president really sit out marriage into 2012? We'll get into it and take your calls.

In her book Quirk: Brain Science Makes Sense of Your Peculiar Personality, neuroscience writer Hannah Holmes explains how biology can provide significant clues about why people feel and act as they do. She discusses how five personality factors work in your brain, and even has a test to show which ones you score hi on. I'll interview her at 3:30 ET. I took the test and you'll be shocked to know I didn't score high on "agreeableness."

At 4:30 et, pop singer, actor and former boy band member Lance Bass joins me a few days before the Friday launch of his new show on Sirus XM OutQ: "The Pop Ten Show." (Friday at 10 ET.) We'll talk about that and about what it's like to be an openly gay celebrity icon these days.

Listen to The Michelangelo Signorile Show weekdays live from 2-6 pm ET on Sirius XM's OutQ 108 and on the Sirius XM iPhone, Blackberry and Android apps. Not a subscriber? Not a problem! Listen online any time with a free seven-day pass or, if you have an iPhone or Blackberry, go to the app store and download Sirius XM for free, for a 7-day trial, and listen on your phone.