What is the percentage of American men and women over the age of 18
who have engaged in anal sex, and what is the percentage of those who
regularly engage in anal sex?

Hello Flipse,

According to Anal Sex Yes! (which cites the University of California
at San Francisco's HIV InSite), approximately 25% of heterosexual
adults in the US have engaged in anal sex at least once.

The same site estimates that between 5% and 10% engage in the activity
regularly, and cites a survey indicating that 6% of women and 8% of
men engage in anal sex at least once a month.

Anal Sex Statistics: How Common is Anal Sex?
http://www.analsexyes.com/statistics.shtml

Hope that helps!

--Missy

Search terms: [ anal sex statistics ]

There is a complex and sometimes awkward practice called
"Quellenforschung." No, this is not a sexual practice, but the
discipline of "source criticism." If you're looking for statistics on
the prevalence of anal sex, would you start with a site called
"AnalSexYes"? Maybe for $2, but still...

The study they site?which I can't find, but let's grant it exists?has
lots of different numbers. S&M workers in Brazil do it a lot; random
women called on the phone do it less. (I'm amazed 4% of women called
out of the blue would even *discuss it*!) I'm not sure where this gets
you.

And, anyway, it's still just one study. Personally, I don't trust a
site called AnalSexYes to do the necessary and sceptical homework.
It's not a sufficient technique, but you might see what AnalSexNo.com
has to say.