Some researchers believe that kissing began millions of years ago as a result of mouth-to-mouth feeding.<img src="http://feeds.feedburner.com/~r/DiscoveryNews-Top-Stories/~4/Inb0X6v7rC8" height="1" width="1"/>
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Some researchers believe that kissing began millions of years ago as a result of mouth-to-mouth feeding.<img src="http://feeds.feedburner.com/~r/DiscoveryNews-Top-Stories/~4/Inb0X6v7rC8" height="1" width="1"/>