Paul McCartney played bass and piano on this one. George Harrison played lead guitar and did backing vocals. John Lennon only sang and played tambourine. Paul and John shared the lead vocal.
The "beep beep" refrain is a take-off on their own "yeah, yeah yeah's" in songs as well as a nod to the Playmates song "Beep Beep."
The original chorus was, "I can give you golden rings, I can give you anything, baby, I love you."
Paul McCartney played this at halftime of the 2005 Super Bowl. The year before, Janet Jackson exposed a breast on live TV, which caused a great deal of controversy. McCartney was a solid choice because he was unlikely to offend anyone.
At the 2005 Live 8 Concert in London, McCartney performed this in a duet with George Michael.
The title of the album comes from "plastic soul," a derogatory phrase McCartney had overheard black musicians using about Mick Jagger. ("Plastic" in those days meant anything fake or processed.) Paul can be heard using the phrase in studio chatter on June 14, 1965, during recording of the " Help!" B-side " I'm Down." Reliably, he put his own spin on the phrase. (thanks, Bertrand - Paris, France, for above 2)