What is the difference between the edited and un-edited version of Grand Theft Auto San Andreas?

Someone was selling Grand Theft Auto - San Andreas for PS2 online and had it advertised as the un-edited original version of the game. So, clearly the game maker removed or changed something. Does anyone know exactly what was "edited" ?What is the difference between the edited and un-edited version of Grand Theft Auto San Andreas?
There was some kind of sex scene in the original version that many parents complained about, so Rockstar got rid of it in the new version.