Classic bawdy British sex comedy starring a host of stars normally to be found in the Hammer Horror films. Two young bucks discover an irresistible sex formula called BK142. Making good use of their fortune, they splash it all over and get out and about. Women, naturally, find them instantly irresistible (despite their desperately hirsute top lips) and jump on them in a frenzy of lust. The pair of neophyte Don Juans soon find, however, that they were little prepared for life as a man stud.