Whenever I'm playing Mario on my PS2 in front of a 9-inch TV, I want to really feel like I'm in the game. That's why I only play while squatting on these Japanese mushroom seats, as they're the best way to be uncomfortable while feeling really half-assedly transported into a magical fantasy world.
Anyhow, apparently you can't slouch while seated like this. As the website says, "Sitting like this, your backbone will be straighten, and you won't experience any uncomfortable feeling. Enjoy TV game, chatting, whatever you like!!" Well, I'm sold. Only $16.77 each.