Stanley Long (Britain’s answer to Russ Meyers) came up with the wheeze of the Serious Documentary to stage period vignettes of sexcapades in the guise of a history of prostitution. Anything to try to avoid the dread scissors of the BBFC. You might recognise some TV faces – Peter Duncan (from Blue Peter) as a gay blade and Carmen Silvera (‘Allo ‘Allo) as a dominatrix. Narrated by Charles Gray. Have a cup of tea instead.