Anthropological studies suggest that kissing is an acceptable practice in up to 90 per cent of cultures. Photograph: iStock

What are the origins of kissing? In early human societies, it is believed mothers weaned their babies by chewing up their food and then passing it to(...)

 Olivia Newton-John and her husband John Easterling kiss as they arrive at the fundraising gala  in Melbourne last month. Photograph: Getty

A kiss is just a kiss according to the words of the song but maybe not. A research study from Oxford University suggests it might be a sneaky way to s(...)