Here is a topic which I never write about because, quite frankly, GR and I are not even remotely interested in doing it.
Just today I was reading on a message board from a thread pertaining to anal sex. Someone commented and said that they always wondered if the common use of AS has it's roots in porn. Now before you shout me down with all your comments of "we could say everything is rooted in porn" or "God is the designer of all sex. The porn industry stole it", I am aware of all that. And it could very well be that you hear more about people doing AS today because of better communication via tv, internet, etc.
What I am interested in learning is the history of AS. Does anyone know how far back AS is mentioned or discussed in history? And does anyone know the stats... say... number of couples who did AS in 1950 as opposed to couples who do it today?
Now go do your research and report your findings back to me ;-).