I know most of the people here are joking, but still I think that some care needs to be taken in how the subject is handled in the game.
I have been in a game where (after having his character tortured), one of the players decided that it proved just what a sick, twisted person the GM was. There were problems between these two before this, but it was a catalyst towards ending that relationship. To my knowledge, the two people involved still will not have anything to do with each other.
I'm not sure how the GM was roleplaying the session. We escaped before my character was to be tortured. I do know that he did manage to shake up one of the other players, although that guy was alright with it.
The point is, you really should consider how a player might feel about the subject.
Some people don't think that such things are fun, and if it isn't fun for them then it probably should not be part of the game. Each person has their own level of comfort with various topics and you shouldn't try to exceed those. It is supposed to be fun for both the GM and players.