I did say I'd do Children of the Grave but in my research I found I had a lot more to discuss about Sweet Leaf. Black Sabbath are going from strength to strength and their third album Master of Reality builds on the artistic and commercial success of Paranoid. Delving into more experimental territory, one song Sweet Leaf spawned a genre and its influence was felt for decades. Not just a stoner anthem, but an uplifting song showing how great cannabis is, and why it should be legalised.