Try being 16 and getting parts for anything.
My favorite:
Me: I need a 12v 50A universal relay, a 20A fuse, and a fuse holder.
Parts Guy: What's the relay for?
Me: I'm wiring a fuel pump.
Yeah, but what kind of car?
It doesn't matter, I just need the relay and fuse.
No, sir, I can't sell you a relay unless you tell me what kind of car it is.
I want a plain universal relay. Where are they, I'll look for it.
There's no need for that sir. What's the make and model of your car?
Ok, fine. It's a 1959 Berkley microcar with a Suzuki GSX-R motor in it, and a full tube frame. The relay I'm looking for goes to the motorcycle fuel pump in the tank we welded. (I always use this car when they ask me what kind of car, and I'm buying a universal part. Never fails to elicit blank stares.)
Blank stare.
So, do you have it in stock, or do you have to order it?
Um, I'm really sorry, but we don't carry that part sir.
Oh man, that's too bad. You don't have any universal relays, do you? Maybe like a 12 volt 50 amp one?
You know what, we actually do! Great idea! They're on isle 5...