Infinite Toothache Sketch

If every tooth had a mouth of its own with teeth inside that, maybe then we would place more value on oral hygene in todays society
,but then who is to say that the universe is infinite?
Do you know for sure? Has anyone proven it?

Maybe the universe is like this picture.. it seems infinite from what we can see, but in reality the universe is only as big as the page it is written on.. even if it seems really big and deep.

Who can answer these mysteries of life? I can't, you can't. We are all just left to make up our own minds on this kind of thing..

Don't even bother thinking too hard about it, it's too complicated. I tried and all I got was a headache.
Infinity is a concept too hard to comprehend.