[Senator Bedfellow]

You are either on one side or the other: unless the world is a Moebius Strip.

Actually, there are no sides at all - the universe is a Klein bottle.

[Doctor Stochastic]

[stands2reason]

I like klein bottles, but I'd rather see a tesseract.

Speaking of impossible objects, do you like "impossible" art? Shigeo Fukuda is my favorite.

If you can't get the images to load on that, here's another link or two that show some of his work.