This article says it's about controlling women. I remember a conversation a few years ago where Howard and Fred were talking about what guys on porn might try with their daughters. http://www.chicagonow.com/families-in-the-loop/2013/11/women-anal-sex/ "When you dig into recent articles that explore the uptick in anal sex â€“ 16% in 1992 to 40% in 2010 â€“ you quickly find two central themes, power and accessibility. For some men, anal sex is an expression of domination over women, who are gaining more and more power in todayâ€™s society. Others believe the rise is related to menâ€™s 24/7 access to hardcore porn through the Internet."