So, there is a couch, a 50.5 centimetre couch, reasonable size for a couch right?

well yes, but this couch can fit an infinite amount of people in it, but it is only 50.5 centimetres. So how does this work?

How could this exist? How does this fit into reality, the universe?

there are many questions

but also, every time the couch is full with an infinite amount of people, when a new person comes, everyone just shifts up, defying laws of physics, because this couch is 50.5 centimetres yet fits infinite people in it.

and every time an infinite amount of people come to sit on the couch even though it full with infinite people, everyone just shifts up an infinite amount to let the other infinite amount to sit there!

This paradox was brought to you by, Rubarbranger