I think a tattoo on a woman is AT BEST a net break even. I don't think they EVER make a woman hotter, but a small cool tattoo on an ankle or shoulder, if the woman is otherwise awesome, might not detract from her. Anything visible, or anything larger than about a quarter, and her beauty is reduced significantly in my mind. I don't even think it's a class issue any more, I just think it looks less attractive than skin.