Just was in Seoul, Thailand and now Singapore this past week. Koreans seem to make a very low grunt sound when saying what in English might be "ok" or "yea" or "right" kind of like uhhh. You may have heard it on Planet of the Apes! Wasn't too sexy but other than that it was very sexy language as was the accent when speaking English. Thai also sounds great and they just love sex which helps so lots of sex sounds (just kidding). Singapore they speak perfect English!