As Aristotle once said, "What is life if not but a series of endless questions?" JK, I totally just made that up. Sounds legit, though, right? Had I not fessed up, you probably would've never known otherwise — unless you had questioned it! Which is to say, we can't learn or grow or become fully functioning human beings without asking questions, and questions involve question marks.
On a date with a hot babe? Without some questions in tow, it'll be your last (unless you're really hot too, in which case OK, maybe you'll get one more). Trying to land that dream job? Good luck without an inquiry or two up your sleeve for the head honcho. There is no such thing as a stupid question — only a stupid punctuation mark. The question mark, alas, is not one.