Sometimes, through no fault of your own, you just miss the song you wanted to hear without knowing it. I've forgotten which songs I requested, but in the early '80s, I called a radio station and had this exchange:
Me: Hi. Would you please play (my song request?)
DJ: Oh! Sorry, but I just played that one.
Me: Oh, OK. How about (another song), then?
DJ: I already played that one, too.
Me: Well, would you be able to play (a third song suggestion?)
DJ: I just played that one, as well! Now, you're pullin' my leg here.
Me: No, I just turned on the radio.
DJ: I see. What's the temperature outside?
I didn't know the temperature. If I had known it, though, I wonder if the DJ would have responded, "You already know everything. You don't need to hear a request," or if he would have relented and let me make a fourth song request.