The World Kissing Competition is an unusual event held annually at the Acquafan Park of Riccione in northeastern Italy. Hundreds of contestants battle in events ranging from 'basketball kissing' to 'underwater kissing'. In the underwater kissing event, the contestants have to kiss underwater in a transparent swimming pool for as long as they can.
In unofficial competitions, teenagers across the world partake in kissing marathons of their own every day.
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