Either pre-porn career sex or current sex with bf, hb or part time lovers (not payed!).
Of course most users dont know and many hope for on-set sex of these girls being the same they enjoy in real life (RL).
And indeed, some of our sweet LP girls can actually get off on set, but than some never do. Its awkward positions, strong lights, heat/cold etc. preventing them to have a real good time.
Also quite many of them had never anal sex in private before working for Luis, Giorgio or Joachim. And some dont have it outside porn even afterwards.
So its a guess vote for most of us.
But some may have talked to some insiders.
And ideally some of the posting porn girls will join in.

Just also please write in why you voted for wich percentage - and based on which of you fave LP girls you did it!