I don’t know why I care about this, but I do: Why do we say “Hi, Guys!” when we’re talking to a bunch of men and women? There’s no way that works in reverse: You would almost never walk into a room and say “Hi, Gals!” if men were present, unless you wanted to make fun of the men, or insult them. You would never, and I mean never, refer to men as “gals” without irony or malice. And yet it’s a commonly-held belief that “guys” refers to men and women. I wonder why that is?
Just kidding. I know why that is. It’s a rhetorical question.