Cheap showers
If you have a cheap shower and someone is in it, and then you have another person go to the bathroom the sim in the shower will get out. This is because the water gets really hot when the toilet flushes. If you don't believe me just look at the trivia questions that are given to you when installing the game.
Theres loads more info this game, right here, with some cheats and tips, answers and The Sims 2 walkthrough.
Comments for this hint