Thoughts lately are sense-based...
1) Everyone probably remembers from health class that our eyes actually see everything upside-down, and our brain flips the image. But what if the world is actually upside down and our brain knows we can't handle that?
2) If you poke something with a stick you can feel its texture via the stick. How the eff does that work?
3) Talked about this before, but still mulling it. Smell is the most adaptive sense. Think about it - you adjust to bad smells and good smells, leave the room, come back, and smell them all over again. What if all our senses worked this way? We could eat horrible food and not care, stab ourselves repeatedly, and go blind occasionally. OK never mind, nature knows what it's doing.