Things I don't understand

I know I use this one a lot, so bear with me, but ya:

The phrase

"You/it/this make(s) my life complete!"

I use it a lot. So do many other people. but what does it mean? I can go die now? No! There are other things I want to do! But whatever you just did is fairly awesome! We need a better phrase.

Why is it that Worldwide, at the same time, people started wearing pants? And only men? This is weird. I know EVERY country didn't start doing this, but quite a few did.

Why are there no synonyms for articles and conjunctions in English, or really any language that I know of. We need more ways to make run-on sentences and create proper nouns.

I learned recently that Latin and Latin-based languages take up 60% of English's roots, yet it is considered a Germanic language. Hmm.

Also,

The Brain. But who does?

A random Side-note, whenever I write "Yay," in my head it sounds like YAHY. I am not sure why.