Analysis of information sources in references of the Wikipedia article "Unfinished Music No. 1: Two Virgins" in English language version.
John and Yoko's public life became a series of conceptual art events. They made avant-garde films and sound collage albums, including Two Virgins (1968) where they appeared naked on the sleeve.
...They also released an album of musique concrete, Unfinished Music No. 1: Two Virgins, the first record issued on the Beatles' Apple label, later that year.
The Lennon/Ono collaborative albums were a critical part of their take on celebrity coupledom. ... The first set to be issued, subtitled Two Virgins, was a sound-collage set reportedly produced during their first night together.