If you can't figure out after all the replies telling you the game is 18, and far worse content is in the game (and other games) yet you are whining about a gay scene, for a game that should be for adults then you are kinda beyond hope.
It doesn't matter if kids can get the game, that's not the point. It's not made for them, it's down to parents / shops to not provide it too them then. Also, considering that it's probably just as easy for them to get GTA4 / a copy of saw the movie which is much worse then your argument is even worse.