Many rock musicians are excellent cooks, I've found, and those that are prefer to eat their own cooking in the studio. I encourage this behavior as I also enjoy the benefits of fresh food.
Time travel used to be thought of as just science fiction, but Einstein's general theory of relativity allows for the possibility that we could warp space-time so much that you could go off in a rocket and return before you set out.
If I do something caring for a friend, I have no doubt in my mind they would do it for me.