Could someone explain these most bizzare dreams I've ever had?

Um, as for the banquet one, I have no idea. But the dandruff one-- maybe it represents someone in you life who is close to you and you keep on getting them "dirty" or somehow taking advantage of them and they let you do it, but he/she doesn't really like it. Maybe you're kinda doing something or giving them something that they are too good for but (since they like you) they let you do it anyway.