I'm interested too, but I know enough about them and their world that I'm not gonna mess with it.

[Dipper's died twice. He's interested in solving the mysteries of Wonderland and to a lesser extent, of Frisk's world. He's not interested in dying again.]

Last time I didn't listen to someone who said not to do something during an event from their world, I got me and my whole family killed. [He says it almost flatly. It was almost a year ago, and it's not like any of them stayed dead. He's fine. He brightens slightly.] Besides, I can always bug them about it later.