My Ball Python won't eat?

Hello,
I have a Ball Python named George.
I try to feed him separately, and I move the prey like you're supposed to. He just ignores it.
Maybe I'm just worried, cause if I just leave the mouse in his tank. (It's already dead of course.) He'll end up eating it if I just leave it there and don't move it. Is this normal? I'm worried cause I wonder if this will make his feeding wrong, will he become aggressive from me not feeding him out of his tank, and having the prey move?
Okay honestly I'm just confused
When I did research, you're supposed to move their prey. However, he doesn't want it when I move it. He just wants it left in his cage and lifeless. Honestly, is this okay? He won't eat unless I just leave it there.

It's fine. I feed my balls in their enclosures as well. Balls are so docile that it shouldn't change. It's a myth that they become aggressive when fed in their tanks.

Sent from my SAMSUNG-SM-G870A using Tapatalk

It's perfectly ok. Just let him eat the way he wants to eat. There will be no aggression from being fed in the tank and there is no reason to feed him in a separate container. :)

Yeah, there's no proof that feeding outside of his tank is a good idea. Inside his enclosure is just fine!

If you leave it there and he eats it, then I suppose that's just the way he likes to eat it. :)