What made super deepthroat great wasn't just the super deepthroating... it was the ability to customize the characters. Not just a random girl, but being able to customize the girl (or guy) just the way you want them.
This should be done in every game. More options equals more players. Not just more fans of your game, but you'll attract a more sophisticated audience, if the player isn't stuck with just a dumb blonde.
Give the player the ability to choose the hair color, skin tones, clothing... this doesn't mean a lot more work for the developer, or a lot more rendering, it can be done procedurally.