The Climax Sisters
From the British sex farce film of a Pop Performer (1975), the second in the Confessions series following the adventures of Timothy Lea (Robin Askwith).
This Motown-styled duo of Ruby Climax (Diane Langton) and Brenda Climax (Linda Regan) sings "I Need You (Like a Hole in the Head!)"; Sue Martine provided Regan’s singing voice.
See also Kipper.