Jefe Bergenstein
Legend
Man, don't you see, this is exactly the problem. If you have a buddy willing to DM, why not support the poor guy now that he's investing so much time and money, and all you do is show up with your character on a sweat-stained sheet without knowing any of your own spells. That the DM enjoys preparing (which is true) is a weak argument against not helping him out in any way. Players are entitled and lazy.
Probably for the same reason I don't monetize all my friendships. If someone invites you over for dinner, do you ask how much you owe them? Maybe Denmark is super different, but that's weird to me.