It was one long kiss - one world-breaking embrace for mankind. A determined Thai couple locked lips for 46 hours, 24 minutes and nine seconds to celebrate Valentine's Day in this southern beach resort town, emerging victorious and exhausted after a landmark 'kissathon' that organisers claim marked the longest recorded smooch in history.

The previous record of just over 32 hours was set in 2009 by a couple in Germany, according to Guinness World Records, whose officials will have to verify the latest milestone for it to become official.