Confessions of a Window Cleaner (1974)

Director: Val Guest
Cast: Bill Maynard, Dandy Nichols, Joan Hickson, John Le Mesurier, Linda Hayden, Robin Askwith, Sheila White, Tony Booth

Synopsis:

Young Timmy starts as a window cleaner in the little company of his brother. Soon he learns that some female customers expect additional service. Young and curious as he is, he reluctantly accepts the juicy duty. However his heart belongs to Liz, who demands the highest commitment until she lets him go all the way.