I am from Sweden and I think that the french are known for anal, but its practised widely throughout most of Europe. Also I think it is popular in Brazil, due to a few reasons including having a lot of people believing that virginity should stay until marriage (but anal sex is ok).
The US is the only country I can think of, they have the highest gay population of all the countries, though plenty of gays do not practice anal.
I don't think GAG is the best place to go to get this sort of answer... email the question to manswers theyll find out for you, personaly I think Brazil sound plausible but I wouldn't be surprised if it turned out to be some random eastern European country like Romania
Greece. The greeks invented ass play.
The Vatican :)
rofl...lmao...this question just made my day :D ...i mean...why would you--... for what reason w--...I don't even--...well I never.
I honestly have no clue. Maybe the US because we make the most p*rn?
Brazil comes to mind only because of how sexually open they are, with India in tow for some reason, but I honestly have never looked that up.