N.S.U.

Written by Cream's bass player Jack Bruce, "N.S.U." was one of the numbers the band performed on stage from the outset. In fact, Jack had written the song for the band's very first rehearsal. N.S.U. is an acronym for "Non-Specific Urethritis," a form of venereal disease Eric Clapton is rumored to have been afflicted with at the time. The lads, apparently having a bit of fun, thought it would be a good title for the song.