This song was from the soundtrack to the film Serious Charge, which was Cliff Richard's movie debut. It was written by Lionel Bart who also wrote the West End and Broadway musical Oliver. It was originally intended for the singer Duffy Power before it was included in Serious Charge.
This was originally a rock song, and as both Cliff and his backing band thought that a song about a blow-up doll was uncool, they originally weren't planning to record it. One of his backing musicians, Bruce Welch, suggested a slower tempo like a country song would work better, so they rearranged it into the now familiar form.
According to 1000 UK #1 Hits by Jon Kutner and Spencer Leigh, Lionel Bart said, "I had taken it from one of those ads in the Sunday papers for a doll that did everything and I wrote it in 10 minutes flat."
In the UK, this was the biggest-selling single of 1959.
In 1986 Cliff did a humorous, anarchic re-recording of this for BBC's charity appeal Comic Relief. It featured the cast of BBC's comedy Young Ones series, which were Rik Mayall (Rick), Adrian Edmonson (Vyvyan), Nigel Planer (Neil) and Christopher Ryan (Mike). When it topped the UK chart Cliff became the first artist to have the same song in two different versions at number one.
This was the first of Cliff Richard 14 UK chart-toppers. He is the only act in the UK to achieve a #1 single in each of the first five decades since the inception of the UK singles chart in 1952.