Foster Friess, the biggest donor to the super PAC supporting Rick Santorum, suggested women used aspirin as a contraceptive.

"Back in my days, they used Bayer aspirin for contraceptives," Friess said in an MSNBC interview today. "The gals put it between their knees and it wasn't that costly."

Friess, a 71-year-old millionaire from Wyoming, is a contributor to the Red, White and Blue Fund, which is backing the former Pennsylvania senator. His comments came as he was defending Santorum's stance on contraception.

Known sometimes for his colorful remarks, Friess is a longtime donor to conservative causes and Santorum calls him a friend. Friess introduced Santorum last week before his remarks at the Conservative Political Action Conference.

Friess' comment caught MSNBC's Andrea Mitchell off guard, and the anchorwoman said she had to catch her breath. She moved on to another subject.