Whoever says that shrooms do not effect your thinking, is not experienced in shrooms. Shrooms to me have a much more of a thought provoking, intense, and altered effect on thinking than acid and other psychedelics do. Many others agree.
Maybe you dose differently than I do, but I usually take at least an eighth of shrooms either eaten strait or coffee grinded into a fine powder, and mixed into a glass of pure, fresh squeezed lemon/grapefruit juice, and drank.