Burt Lancaster kisses Deborah Kerr passionately in a beach scene in the 1953 film "From Here To Eternity." The two shared one of cinema's most famous kisses .. and bacteria, most likely. (AP Photo/Columbia Pictures)
A kiss is just a kiss—except for when it's a major bacteria conduit. A new study published in Microbiome takes a look at what happens when we kiss intimately, and finds that 10 seconds of passion can result in the transfer of up to 80 million bacteria.