Secrets of a Superstud

Secrets of a Super Stud, also known as Its Getting Harder All the Time and Naughty Girls on the Loose is a 1976 British Sex Comedy, one of many to be also filmed in a hardcore version for export. The film was shot at Twickenham Film Studios under the title Custers Thirteen, the general release prints and the hardcore version were processed at Kay Labs at Highbury, North London.

Custer Firkinshaw Anthony Kenyon the owner of Bare Monthly Magazine is up to his neck in dirty pictures and sexy secretaries. His hedonistic ways are however temporary halted when his Uncle Charlie dies and Custer is pitted against his relatives. His Uncle leaves Custer a fortune in the will, but only on the condition that he marries and has a child withinmonths, otherwise it all goes to his relatives. Custers money grabbing Aunt Sophie Margaret Burton knows only to well about Custers swinging ways, so keep tabs on him by hiring a crooked private detective Bernie Selby Alan Selwyn. When Custer visits a doctor both parties discover that due to Custers oversexed lifestyle hes only gotunits of sexually activity left, meaning he has onlymore attempts to father a child.When Aunt Sophie learns of this she plans to stitch Custer up calling on Selby to hire girls to seduce Custer and use up those potentunits of sexual activity. Thereon in, its a race against time as Custer tries to find a suitable bride to impregnate while Selbys girls pose as cat burglars, lost neighbours and even drag up as meter inspectors in order to catch lure Custer into temptation. ........

Source: Wikipedia