There will always be topics we simply don't understand.Many of us may have encountered these weak spots in our school days: Perhaps you excelled at languages, history, and science, but you just couldn't wrap your head around math. Or maybe you were really good at all types of math, and then you simply couldn't process geometry. Hey, it happens. No one is perfect.And who can blame you? With all the weird and wacky things going on in the world around us, it would be impossible for any one individual to understand everything happening. Most of us don't even understand why our own parents or kids do the things they do; how could we ever expect to understand total strangers?Redditors were asked to share the concepts which, despite an abundance of explanation, they still simply cannot understand. When it gets down to the specifics, these are downright hilarious.