Former Sen. Rick Santorum (R-Pa.) formally enters the 2016 GOP presidential primary Wednesday, embarking on his second White House run.
Santorum's made sure to stay in the headlines between presidential bids, offering up commentary on everything from the Islamic State to immigration to President Barack Obama.
Santorum admitted that saying "dumb things" during his 2012 campaign fueled his eventual loss. But as HuffPost pointed out in 2011, Santorum's controversial thoughts on issues related to sex, marriage and contraception spanned all the way back to at least 2003.
Below, a look back at some of Santorum's past statements on sex:









A version of this slideshow was originally published in November 2011.