Behaviour (released as Behavior in the United States) is the fourth studio album by English synth-pop duo Pet Shop Boys, released on 22 October 1990 by Parlophone. A Japanese special edition included a bonus mini CD, exclusive artwork and printed lyrics in a white velvet-like box. Background Harold Faltermeyer produced Behaviour at his Red Deer studio in Munich, Germany. Because they were dissatisfied with the available digital synthesisers and samples, Pet Shop Boys wanted to use analogue synthesisers. Faltermeyer was chosen as a producer as he happened to be an expert on analogue equipment. The result was a Pet Shop Boys album that differed from both the previous album, Introspective, and the 1993 follow-up, Very. In places, the album expands upon the synth-pop genre with flavours of guitar pop ballads, as with "This Must Be the Place I Waited Years to Leave" and "My October Symphony" (a song about the decline of the Soviet Union) featuring guitarist Johnny Marr. Later, singer Neil Tennant would reflect on the different style of Behaviour: " It was more reflective and more musical-sounding, and also it probably didn't have irritatingly crass ideas in it, like our songs often do". Tennant stated the album was inspired by fellow synth-pop group Depeche Mode's album Violator, released that same year. Singles "So Hard" (R 6269 – 24 September 1990) The video was directed by Eric Watson. The b-side was "It Must Be Obvious", with the USA release also featuring the Italian Mix of "Paninaro", which was originally released on Disco. Remixes were by the Pet Shop Boys themselves, The KLF and David Morales. The KLF also remixed "It Must Be Obvious", which was only available on The KLF versus Pet Shop Boys CD and 12-inch of the single. "Being Boring" (R 6275 – 12 November 1990) The video was directed by Bruce Weber. The B-side was "We All Feel Better in the Dark". There were Pet Shop Boys Extended Mixes of both a-side and b-side, and there was a remix of "Being Boring" by Marshall Jefferson and two remixes of the B-side by Brothers in Rhythm on a limited edition 12-inch and CD of the single. "How Can You Expect to Be Taken Seriously?" (E2-56205 – 1991) [US only] The video was directed by Liam Kan. The single was radically remixed from the album version by Brothers in Rhythm, and this become the version on the double