08/17/2011 01:37 pm ET Updated Oct 17, 2011

Maggie Gyllenhaal Talks Sex On 'Curiosity' (VIDEO)

Leave it to Maggie Gyllenhaal to ask the most provocative question on Discovery's new series "Curiosity." On this Sunday's episode (for mature audiences), the star of the stimulating upcoming film "Hysteria" hooks up with experts to find out why sex is fun.

Read more on ew.com