To get to the other … er, um …
Ok, so you have to be a bit into math to appreciate the enigma of Mobius Strip and this joke
The Mobius strip is the ultimate metaphor for something simple, yet profound – that stimulates one to look for depths even in seemingly shallow waters! Even with a well-developed imagination it is hard to see how such a strip could exist, even with one in hand!
Sphere has two sides, you can be inside it our outside it. But can you imagine a thing that has only one surface?
The first one-sided surface was discovered by A. F. Möbius(1790-1868) and bears his name: Möbius strip.