Not long ago, it was improper to show married couples with a single bed on TV. I’m not sure why this came about, considering even the Puritans liked to get it on, but somewhere somehow it was considered vulgar and improper to imply on the boob tube that married people engaged in coitus.
Go back fifty years, though, and you’ll find a different story in the fledgling film industry. Around the turn of the century, public displays of affection were frowned upon. However, Thomas Edison knew that if he wanted this whole movie thing to catch on he needed to get people’s attention. So, much like the “sex sells” ad mongers of today, he used sex to get people to embrace the new technology. See for yourself in this film from 1896 called “The Kiss”!