On Pat Robertson's television show on Thursday, Robertson expressed his mystification with the phenomenon of women watching porn, and had particular trouble coming to grips with the runaway success of the 50 Shades of Grey series.

Robertson asked Kristi Watts, in his words a "sweet Christian girl," whether she "sees anything in porn that attracts you." Personally, Robertson finds it "boring."

"The thing that shocks me," Robertson says, "is we always thought this was a male thing."

Robertson notes that 50 Shades of Grey is the "fastest-selling paper book of all time," and that its author is a "little housewife-y type that doesn't look like some glamour queen."