Life Magazine's Guide to Kissing, ca. 1942. pic.twitter.com/II5ruDEFbe
— History in Moments (@historyinmoment) November 11, 2015
Once upon a time, in the middle of World War II, there was a right way to do it. And a wrong way to do it. Are there rules in 2016? And what would they look like? That's your homework assignment for this Valentine's Day weekend.