We all know who the sandman is, this listing will call him forth for you. He can give pleasure dreams, or painful ones. He can give Pleasant dreams or nightmares. It all depends on what you ask him for and to whom you send him. if its somebody you want to think of you always send them sexual pleasure dreams to always think of you, if it's somebody you hate, send them nightmares ect...
The sandman does require payment in exchange for his dreams and it is one you must give him and work out for yourselves in your dreams, he will let you know what he wants in payment. Trust me on this one.