sum1 has answered your question on the first page by the way i think they called it make luv or sumthing -check it out on the unanswered page it is titled the new lynx advert is...
isobar wrote an incredibly detailed and interesting reply to a similar question -- tracing the song back to a 1930s recording called "Another Man Done Gone" by Vera Ward Hall (aka Vera or Adel Ward) but wondering whether the ad actually featured a RErecording given the improved sound quality. I'm sure there's more info out there. Anyone?