Most recently, a 2006 survey conducted by the Centers for Disease Control determined that the incidence of anal relations in the heterosexual population is on the increase. The survey showed that 38.2 percent of men between 20 and 39 and 32.6 percent of women ages 18 to 44 engage in heterosexual anal sex...went up a little since i looked last, ggls..And thats all i will say on this topic, I still love fucking a man in the ass,mmmmm,I believe its all about there gspot and prostate.