Adults Only is the first album recorded by Ray Dorset, also known as Mungo Jerry, with his German blues band. Some of the songs are blues standards that have been in his set for several years, others are new recordings of numbers from the Mungo back catalogue, including "I Just Can't Say Goodbye", originally on the 1977 album Ray Dorset and Mungo Jerry, an extended version of "Open Up", a worldwide hit for the band in 1972, recorded live in concert.