precedent for Björk's "all vocals, all the time" experiment Medúlla (2004) and said that, overall, "The two [artists] share more common ground than their fans might think." Rundgren's production work for other artists were largely one-off affairs. Exceptions were Grand Funk Railroad, the New York Dolls, the Tubes, Hello People, and the Pursuit of Happiness. He described his typical function as being a "'songcraft' agitator". In cases where the act's songs were unfinished, he would complete them and decline a writer's credit. Some of his collaborators frequently characterize him as a "genius", but also "sarcastic" and "aloof". His most notorious production was for XTC's 1986 album Skylarking, known for the creative tensions and disagreements that arose during its sessions. The album is sometimes regarded as both the pinnacle of Rundgren's production career and of the career of XTC. He commented that, in spite of the turmoil surrounding its making, the record "ultimately ... sounds like we were having a great time doing it. And at times we were having a good time." All three members expressed admiration for the end product. The Fool guitar During the mid-to-late 1970s, Rundgren regularly played the eye-catching psychedelic Gibson SG (known variously as "Sunny" or "The Fool"), which Eric Clapton had played in Cream. After he had stopped using it ca. 1968, Clapton gave the guitar to George Harrison, who subsequently 'loaned' it to British singer Jackie Lomax. In 1972, after meeting at a recording session, Lomax sold the guitar to Rundgren for $500 with an option to buy it back, which he never took up. Rundgren played it extensively during the early years of Utopia before retiring the instrument for a short time in the mid to late 1970s, which in that time he had the guitar restored having a lacquer finish applied to protect the paint and replaced the tailpiece and bridge to stabilize tuning, bringing the guitar back out on tour during the 1980 Deface the Music tour and using it on and off throughout the 1980s until 1993 when he permanently retired the guitar, eventually auctioning it off in 1999; he now uses a reproduction given to him in 1988 by a Japanese fan. Personal life Rundgren began a relationship with model Bebe Buell in 1972. During a break in their relationship, Buell had a brief relationship with Steven Tyler, which resulted in an unplanned pregnancy. Buell gave birth to