Why would he not want me to get him anything but ask what I'd like him to get me?

[Me]

I asked a friend what he'd like for chirstmas and he said please don't get him anything but he appreciates it, then asked if I wanted anything. I've never heard him ask for anything but he appreciates it when he does get something. Like a friend offered to buy him a burger when we were getting some and he kept say please don't but seemed to enjoy it when she got it anyway. Is he just trying not to be a bother? And should I ask for something or is he just offering to be nice? He's too polite!!! lol