I know !!! Position 45 in the Kama Sutra ... It's called the reverse cowgirl. I can already feel my answer being deleted :) my filters on but it's not working....
A riddle, I turn around once, What is out will not get in. I turn around again. What is in will not get out. What am I?
Well my first guess was a door since to close stuff you need to turn the door on it's hinges, but then I read the answer so I guess I should say it's a key
Well, I read Rex's correct answer .... It makes perfect sense. The first thing I pictured was a turnstile.