"Be" means to ask for something, like a favor or an object.
"Fråga" means to ask for information..
It's because be om means "ask for", while "ask about" would be fråga om in Swedish. And to complicate it, fråga efter also means "ask for".
This is how I feel about getting my water refilled or my empty plate taken away at a restaurant. Nowadays, the wait staff always interrupt my conversations to ask, "Are you finished?" or "More water?" or whatever. It used to be part of the art of serving in a nice restaurant to notice when someone's coffee cup is empty and silently and unobtrusively refill it and disappear. And the customer would cross his or her knife and fork a certain way on the plate to indicate, "I'm finished with this," and the server would appear and whisk it away without the need for conversation. The good ol' days. I miss that!